From 2015 to 2020, Muslim women in countries like Finland recorded an average of 3.1 children per woman, compared to 1.7 among non-Muslims.

Pew’s analysis explains that this difference stems from two main factors: age and fertility. Muslim populations in Europe tend to be younger and have higher fertility rates, while non-Muslim populations are older and generally have fewer children.

Many European nations now have overall fertility levels well below the “replacement rate” of 2.1 — the average number of children needed to maintain a stable population. Without migration or shifts in birth trends, that means gradual population decline.

But Pew researchers caution that fertility alone doesn’t explain Europe’s demographic future. Factors like migration, education, urbanisation, and economic conditions all influence how populations evolve. They note that while Muslim birth rates are higher, they are not static, they often decrease as communities settle, integrate, and adapt to local social and economic environments.

The data comes at a time when Europe faces growing concerns over aging populations, labor shortages, and social integration. Policymakers in countries such as Germany, France, and Sweden are debating how to balance immigration, family policies, and workforce demands in the decades ahead.

Ultimately, the Pew findings highlight a simple but significant reality: fertility trends are not just about numbers, they reflect deeper social shifts. Europe’s demographic future will depend not only on how many children people have, but also on how societies adapt to change.

According to the data , this includes China, Russia, the United States, Brazil, and Indonesia, nations that together make up nearly half of the world’s population. Meanwhile, countries like Nigeria, Ethiopia, Pakistan, Bangladesh, and India have also seen steady declines, though their rates remain above replacement for now.

In 2000, Ethiopia averaged over seven births per woman. By 2023, that number had dropped to around 4.5. Nigeria went from 6.8 to 4.5, while India, long associated with a booming population, has fallen from 4.8 to just above 2.1. China’s fertility rate, once near three births per woman, now hovers around 1.0, among the lowest in the world.

The decline isn’t limited to one region or culture. It’s tied to rising education levels, urbanisation, and the growing economic cost of raising children. Women’s increasing participation in the workforce, delayed marriage, and wider access to contraception are also key factors.

The International Monetary Fund (IMF) recently described this global fertility drop as “unprecedented in human history,” warning that it will reshape labour markets, pension systems, and migration flows. Similarly, The Lancet published research predicting that plummeting birth rates will “transform the global economy and the balance of power.”

But beyond the numbers lies a human story. Many couples today are choosing or feeling forced to have fewer or no children. A UN report found that the main reason is not biological infertility, but the financial and social pressures of modern life. Rising living costs, unstable jobs, and a lack of childcare make parenthood feel out of reach for millions.

Countries once worried about overpopulation are now struggling with the opposite problem. China, for instance, has begun offering cash incentives and tax breaks to encourage births after its population fell for the second consecutive year. Vietnam recently ended its long-standing two-child policy as its fertility rate slid below 2.

In the United States , the birth rate is at its lowest in more than a century. The Centres for Disease Control and Prevention (CDC) reported that American women had an average of 1.6 children in 2023, far below replacement. Brazil shows a similar pattern, and Russia continues to lose population despite government incentives.

Asia follows closely, increasing by around 29.5 million people per year. In contrast, Europe’s population is shrinking, losing nearly one million people annually.

North America gains about 3.9 million people each year, while South America adds 2.4 million and Oceania grows modestly by 532,000. These regional differences paint a clear picture of how global growth is shifting and how the world’s demographic balance is changing rapidly.

The contrast between Africa and Europe reflects deeper demographic trends. In much of Africa, birth rates remain high, and populations are young.

Countries such as Nigeria, the Democratic Republic of Congo, and Ethiopia are projected to double in population by 2050 if current trends continue, according to the United Nations’ World Population Prospects 2024 .

Europe, on the other hand, is experiencing the opposite. Low birth rates, ageing populations, and limited migration have led to steady declines in several countries, including Italy, Germany, and Poland. Even with longer life expectancies, the number of births often falls far short of the number of deaths.

The World Bank notes that this demographic transition, moving from high to low fertility and mortality rates, is reshaping economies and societies around the world. The Broader Implications

These population shifts have real consequences. For Africa, rapid growth brings opportunities and challenges. A young workforce could fuel economic expansion, but governments must also provide education, jobs, housing, and infrastructure for millions of new citizens each year.

Meanwhile, in Europe, shrinking populations are putting pressure on pension systems, healthcare services, and labor markets, prompting debates about immigration and family policies .

Globally, the United Nations forecasts that population growth will slow over the coming decades, eventually peaking around 2084 before beginning to decline.

The population divide is already visible in today’s headlines. In Africa, rapid growth is straining resources and intensifying discussions on food security and climate resilience. A recent UN report found that while global hunger has slightly declined, Africa still faces severe food shortages driven by conflict and extreme weather.

According to the graphic sourced from UN 2024 data, Africa’s median age sits at about 19.3 years, making it by far the youngest continent. Europe leads in age, with a median of 42.7 years.

Meanwhile, North America is 38.7, Asia is 32.5, South America is 31.7, and Australia/Oceania is 33.3. The contrast highlights how differently regions face the twin forces of youthful populations and ageing societies.

This map is more than visual: it reflects the demographic pressures reshaping global economics, politics , and social systems. Let’s unpack what these differences mean — and why they matter today.

Why Africa remains so young

Africa’s median age of about 19 means that most of its population remains in childhood or youth. This youthful demographic is a legacy of high birth rates and improving child survival, even as life expectancy has been rising globally.

It also places Africa in a moment of potential advantage, often called a “demographic dividend”, where a large cohort of working-age people could drive growth, innovation, and productivity, if the right investments are made in education, health, and jobs.

But this opportunity is not automatic. Without matching growth in infrastructure , education, and employment, Africa instead faces youth unemployment, social instability, and pressure on public services.

The median-age map makes clear just how concentrated the world’s youngest populations are and how urgent it is for African nations to capitalise on youth potential.

Europe’s ageing profile

Europe’s median age of 42.7 signals its deep transition: fertility well below replacement levels, rising life expectancy, and a shrinking younger cohort. This demographic structure intensifies pressure on pensions, healthcare systems, eldercare, and social safety nets. As Europe ages, fewer workers must support more retirees.

Yet even within Europe, disparities are growing. Some countries, especially in Eastern Europe, are facing sharper population decline and brain drain, while others wrestle with integrating migrants to balance age structures.

A recent analysis from the Bruegel think tank suggests that Europe’s ageing burden may be more manageable than often assumed, projecting only modest increases in age-related public spending through 2070. Still, the structural challenge remains significant.

Global ageing

The world is getting older, everywhere. UN projections show that by mid-century, people aged 60 and over will more than double, making up a much larger slice of the global population.

In developed economies, this trend is already clear: working-age ratios (people aged 15–64) have shrunk over time and will keep falling. The Path to 2075 report projects that median ages in “developed markets” will climb toward 47 years by 2075, while in “emerging markets” they’ll approach 40.

Health systems, retirement systems, and labour markets all strain under this shift. The World Health Organisation (WHO) warns that as more people live into their 80s and beyond, chronic diseases, care dependency, and related costs will grow.

Created by Maven Mapping in collaboration with The World in Maps, the visualisation claims to show how the average cognitive scores of residents vary across the country, but experts urge caution before drawing sweeping conclusions.

According to the map, Massachusetts, New Hampshire, and Vermont lead the nation with averages above 103, while Mississippi, Louisiana, and California sit at the lower end, with averages ranging from 94 to 96. The broader trend suggests higher IQ averages in the Northeast and Midwest, and lower scores in parts of the South and West.

These numbers echo similar findings from other sources, such as DataPandas and Zippia , which both identify Massachusetts as the top-ranking state and Mississippi as the lowest.

However, researchers emphasise that IQ maps are not direct reflections of innate intelligence . Instead, they are typically derived from proxies like standardised test results (SAT, ACT), education levels, and adult competency assessments rather than statewide IQ testing.

Studies such as McDaniel (2006) and more recent updates by Pesta et al. (2022), available via ERIC , acknowledge that older datasets may no longer represent current demographics or education systems.

IQ itself is a complex construct, measuring specific cognitive abilities such as reasoning and problem-solving, not overall potential or worth. A few points of difference between states may reflect factors like school funding, healthcare access, childhood nutrition, or even migration patterns, rather than raw intellectual ability.

As The New York Post reported in a 2024 analysis, wealthier states with better-funded schools tend to perform higher on intelligence proxies, reinforcing the link between socioeconomic advantage and cognitive development.

The broader picture is more concerning: several studies suggest that average IQ scores in the U.S. may actually be declining for the first time in decades, a reversal of the long-observed “Flynn effect.”

Analysts cited by Yahoo Tech warn that shifts in education quality, digital distraction, and changing learning habits could be contributing factors. Similar declines have been reported in parts of Europe, including the UK and Norway, indicating a possible global trend.

Globally, as of 2025, there are about 101.07 males for every 100 females in the world population. That slight male majority is driven largely by higher birth ratios favouring boys, though over time that tilt tends to fade as women live longer on average.

However, beyond childhood, the balance shifts in many countries toward more women, especially in older age brackets.

Countries such as Qatar, the United Arab Emirates, Oman, and Bahrain appear in deep blue places where men heavily outnumber women. According to projections, Qatar’s male-to-female ratio is approximately 246 men per 100 women, the highest in the world currently.

Much of this is due to labour migration. That is, Gulf states import huge numbers of male workers for industries such as construction, oil, and infrastructure. These migrant populations skew the sex balance dramatically.

On the flip side, much of Europe, parts of Latin America, and Russia lean strongly towards red (more women than men). In Russia, for example, decades of elevated male mortality (from lifestyle, health, or conflicts) have dramatically thinned the male ranks.

Eastern European nations also show pronounced female majorities, a legacy of war losses and health – and a reminder that sex ratios are shaped by far more than birth preferences.

Then there are the more subtle shades: nations whose ratios are near parity — light pink or light blue. Ghana, for instance, has approximately 99.7 men for every 100 women in 2025, essentially balanced.

India and China, with their massive populations (and well-documented gender biases), still register as having more men than women on aggregate.

This demographic snapshot also arrives amid renewed global debate about gender and leadership.

At the 2025 UN General Assembly, voices are growing louder for the appointment of a female U.N. Secretary-General , breaking an 80-year run of male leadership.

Elsewhere, new reports warn that artificial intelligence may disproportionately threaten women’s jobs (28% at risk vs 21% for men) unless action is taken to address the gender digital divide.

A new analysis of daily usage by age group shows just how differently generations engage with digital platforms, and why advertisers, investors, and businesses are paying attention.

The data reveals that those aged 18–24 spend the most time online, about 186 minutes per day across TikTok, Instagram, and Facebook, with TikTok taking the lion’s share at 76 minutes.

Time drops significantly in the 25–34 and 35–44 brackets, averaging 140 and 127 minutes respectively, though Facebook’s share of usage rises steadily with age. By the time users are in the 55–64 group, they spend less total time online than young adults, but nearly half of that time is devoted to Facebook.

This matters because where people spend their time is where businesses spend their money. ElectroIQ reports that 73% of Boomers have purchased via Facebook in the past three months, underlining why brands continue to invest in social commerce campaigns that target older, higher-spending demographics.

The younger demographic’s dominance on TikTok and Instagram, meanwhile, is driving influencer marketing, short-form video advertising, and impulse-purchase strategies — particularly for fashion, beauty, and entertainment sectors.

Market performance reflects these trends. Meta, parent company of Facebook and Instagram, reported a 22% year-over-year revenue increase in Q2 2025, crediting growth in ad spend and improvements to its AI-driven advertising tools.

Platforms that capture younger audiences, like TikTok, continue to dominate brand marketing budgets and influence global culture, while Facebook remains a powerhouse for advertisers aiming to reach older, more affluent users.

The business implications are clear: digital strategy must be tailored to where each generation actually spends its time.

For brands, this means not just posting across platforms, but designing campaigns with specific formats and audiences in mind — from TikTok’s vertical video and trending audio to Facebook’s marketplace and community groups.

For investors, it reinforces why companies like Meta, TikTok, and Reddit are closely watched indicators of where advertising dollars and attention are flowing.

The United Nations’ World Population Prospects 2024 projects that the global population will climb from around 8.16 billion in 2024 to 9.66 billion by 2050.

Nowhere is this transformation more dramatic than in Sub-Saharan Africa. Angola, for instance, is forecast to nearly double its population, growing by an astonishing 93.4% to 218 million by mid-century. Tanzania follows closely with 90% growth, while Egypt, Ethiopia, and the Democratic Republic of Congo also show sharp upward trends.

By 2050, one in four people on the planet will be African, according to the UN. For nations like Nigeria, which is expected to surpass 214 million people, this demographic surge presents both an immense opportunity and a pressing challenge: to build the infrastructure, schools, and healthcare systems needed for a booming, youthful population.

In Asia, the picture is more mixed. India will remain a population giant, growing modestly by 12% to 1.68 billion, while Pakistan’s growth is somewhat faster, bringing it to more than 370 million people. Indonesia is set to rise to 320 million.

Yet China, once the most populous nation in the world, is projected to shrink over the coming decades, cementing India’s position as the world’s largest country. This shift reflects a broader slowdown across East Asia, where ageing and declining fertility are reshaping economies and societies.

Taken together, these figures underscore the profound changes underway. The UN projects that the global population will peak at about 10.3 billion in the mid-2080s, before gradually declining to roughly 10.2 billion by 2100. That long-term trend reflects falling fertility rates worldwide, even in regions that are still expanding quickly today.

However, Africa’s rapid growth could deliver a powerful economic dividend if countries successfully invest in education, jobs, and governance. At the same time, slower-growing and ageing regions in Europe and East Asia face the opposite challenge: shrinking workforces and rising dependency ratios.

In short, the world of 2050 will be far more African, somewhat more South Asian, and considerably less European and East Asian than it is today.

South Korea spans about 100,222 km² and has around 51.2 million people (2025), ranking as the world’s 29th‑most‑populous country. Ireland covers roughly 69,947 km² and has 5.34 million residents.

These figures mean the Korean Peninsula is about 40 % larger than Ireland and supports nearly ten times more people. South Korea’s population density approaches 510 people per square kilometre, whereas Ireland’s is about 76 per km² when calculated from official data.

The physical landscapes also differ. South Korea is mountainous, with only 30 % lowland, and has more than 3,000 islands scattered along its coasts. Ireland, by contrast, features a central plain rimmed by low mountains and a rugged western coastline dotted with cliffs and bays.

The River Shannon, at 386 km, is its longest river. Thus, while the outline fits, the Korean Peninsula extends farther south and contains more varied terrain.

These demographic and geographic contrasts underpin large economic disparities. South Korea has transformed from post‑ war poverty to become a highly developed export powerhouse. Its nominal GDP of US$1.87 trillion makes it the fourth‑largest economy in Asia and 13th‑largest globally.

Ireland’s economy is smaller in absolute terms but ranks among the richest in Europe; its GDP per capita is about €79,300, roughly 111 % above the EU average, and the country accounts for about 3 % of the European Union ’s total GDP. Low corporate taxes and an English‑speaking workforce have attracted multinational tech and pharmaceutical firms.

Culturally, the countries diverge as well. South Korea’s capital, Seoul, anchors a metropolitan area of more than 10 million people, and over 81 % of the population lives in urban areas.

The nation faces demographic challenges such as an ageing population and low fertility. Ireland is less urbanised, with more than 40 % of residents living in rural areas and immigration helping to sustain growth. Its history of emigration has given way to a more multicultural society.

Islam first reached Africa in the seventh century when the Umayyad and Abbasid caliphates spread the faith across the northern edge of the continent. Over time, Muslim kingdoms and trans-Saharan trade networks entrenched Islam across North and West Africa.

Christianity arrived in parts of northeast Africa within a few centuries of Jesus’s death, but its rapid expansion in sub‑Saharan Africa occurred much later, during European colonial missions in the 15th century. Several countries lying between the two zones, including Nigeria, Cameroon and Sudan, now have large populations of both faiths.

In Nigeria’s case, a roughly 50‑50 split between Muslims and Christians means it hosts about 115 million Muslims – the largest absolute number in any African country. Mauritius stands out because Hindus make up about 47.9 % of its population, a legacy of indentured Indian labourers who were brought to work on sugar plantations during colonial times.

The Pew Research Centre notes that between 2010 and 2020, the population of sub‑Saharan Africa grew by 31 % to 1.1 billion. Christians now account for 62 % of the region’s population, while Muslims make up roughly one‑third; religiously unaffiliated people and followers of traditional African religions each represent about 3%.

In absolute terms, the number of Christians rose to 697 million (up 31 % from 2010) and Muslims to 369 million (up 34 %); Hindus numbered just over a million. Pew emphasises that Muslim‑majority countries cluster in the north, near the Middle East and North Africa, while Christian‑majority countries dominate the south.

This division is so pronounced that it appears within countries: Nigeria’s mostly Muslim northern states and Christian south share a porous frontier, and this north‑south fault line contributed to Sudan’s split into Sudan and South Sudan in 2011. By comparison, the Middle East–North Africa region is overwhelmingly Muslim—94 % of its 440 million people identify as Muslim and only about 3 % as Christian.

Some countries resist neat classification. In Eritrea, estimates of religious composition vary widely: some sources put the Christian share between 47 % and 63 % and the Muslim share between 37 % and 52 %.

A 2010 national health survey found 61.4 % Christian and 38.4 % Muslim, whereas the U.S. Commission on International Religious Freedom’s 2021 report described the population as split roughly in half.

Ethiopia also balances a large Muslim minority with a dominant Orthodox Christian tradition, and in Sudan, the Muslim‑dominated northern provinces separated from the mostly Christian south in 2011. Mozambique saw the region’s largest increase in Christian share over the past decade, while the Muslim share has increased in Benin.

The milestone coincided with a historic demographic shift of India surpassing China to become the world ’s most populous country, illustrating how fertility trends and migration are reshaping the planet.

Top 10 countries by population

In the early post‑war era, the planet was remarkably young. According to the chart, the global median age fell from 22.2 years in 1950 to a low of 20.3 years in 1970 before beginning a long ascent.

By 1990, it had climbed back to 22.9 years, reflecting gains in child survival and longer life expectancy. The pace of ageing then accelerated: the median age was about 24 years in 1995, 25.1 years in 2000 and 27.2 years by 2010.

Figures for the mid‑2020s illustrate how far the demographic transition has progressed. The chart projects a world median age of 29.6 years in 2020 and 30.9 years in 2025.

This trend is corroborated by data from Worldometer’s World Demographics page, which states that the median age of the global population in 2025 is 30.9 years . The same source shows a clear upward trajectory in a chart stretching back to the 1950ssrv1.worldometers.info.

According to demographers, the sharp fall in the world fertility rate is a major reason why it is ageing. The world’s total fertility rate has fallen from around five children per woman in 1950 to about 2.2 children per woman in 2024, close to the replacement level. Smaller family sizes slow population growth and raise the median age.

Other reasons could include advances in medicine, sanitation and nutrition. This means people live longer. More older adults relative to children increases the median age. Additionally, as more people move to cities and women spend longer in school, family formation is delayed and fertility falls further.

While the global population is getting older, the pattern is uneven. Regions such as Europe and East Asia already have median ages above 40. Countries like Japan and Italy, for example, have high shares of elderly citizens and face shrinking workforces.

At the other end of the spectrum, sub‑Saharan Africa and parts of South Asia remain relatively young, with median ages in the late teens or early twenties.

These contrasts mean the world must adapt in different ways. Developed economies worry about paying for pensions and healthcare as the working‑age population shrinks, while younger nations must create enough jobs and infrastructure to support rapidly growing youth populations.

Implications for the future

The demographic shift toward an older world has far‑reaching consequences:

Countries like Serbia and the Ottoman Empire are shaded the darkest, indicating that more than 10% of their populations died; other nations fall into bands ranging from 4‑10% down to below 0.5%.

Historians still debate how many people died in the Great War. According to the French Institute for Demographic Studies (INED), the conflict caused nearly 10 million military deaths . The institute notes that over 2 million Germans, nearly 2 million Russians, nearly 1.5 million French, about 800,000 Britons and 650,000 Italians were killed.

An article for the U.S. television network History cites an official post‑war report noting that the Allied powers: Britain, France, Russia, Italy, Serbia, the United States and others, lost around 5.4 million military personnel , including 885,138 Britons, 1,397,800 French soldiers, 1,811,000 Russians, 651,000 Italians, 275,000 Serbs and 116,708 Americans.

The Central Powers: Germany, Austria‑Hungary, the Ottoman Empire and Bulgaria lost about four million soldiers. The same article notes that fatalities included those who died from wounds, disease and accidents.

Countries that lost more than 10% of their people

The darkest shading on the map highlights nations where more than one in ten people died. Serbia is the most extreme example. Small yet caught at the heart of the conflict, Serbia lost about 275,000 soldiers, according to the Allied report cited by History.

The demographic impact was catastrophic. INED describes France as the allied country with the highest proportion of deaths after Serbia, implying that Serbia’s losses were even higher relative to its population. Many demographers estimate that around one‑sixth of Serbia’s pre‑ war population perished when military and civilian deaths are combined.

The Ottoman Empire (modern‑day Turkey) also appears in the darkest category. The International Encyclopedia notes that losses were particularly heavy for Turkey because poor sanitation and food shortages added to battlefield deaths. Official figures vary widely: one table in the encyclopedia lists military deaths ranging from 325,000 to 804,000.

Factoring in civilians, some historians estimate the empire lost more than 13% of its population. Parts of Africa and the Middle East, such as German East Africa (present‑day Tanzania) and Libya, also show extremely high mortality in the map, reflecting local conflicts and famine.

While global attention often focuses on the population giants of India and China, Indonesia’s demographic footprint remains one of the world ’s most significant yet underrecognised stories.

As of 2024, here are the world’s most populous nations:

Indonesia is the largest country in Southeast Asia by population, and the largest Muslim-majority nation in the world.

With over 17,000 islands, Indonesia's population is spread across diverse urban centers like Jakarta, Surabaya, and Medan, as well as remote island communities.

According to the  World Bank , Indonesia’s median age is just 30.2 years, making it significantly younger than countries like China (39) or the U.S. (38.5).

This demographic advantage is often referred to as a “demographic dividend”, in other words, a window of opportunity for economic growth.

Spread across more than 17,000 islands and 38 provinces, the nation’s demographic distribution highlights stunning contrasts in population density, economic activity, and regional development.

West Java: The nation’s most populous province

Topping the charts is West Java with over 51.3 million residents, more than the entire population of countries like South Korea or Spain.

As a key economic and industrial hub near Jakarta, West Java continues to draw internal migration from rural areas, boosting its urban population and spurring infrastructure growth.

Closely following are:

These provinces form Indonesia’s political and economic heartland, collectively housing more than half the country’s population.

Sumatra and Kalimantan

These regions play a pivotal role in agriculture, mining , and the government's ongoing plan to relocate the national capital to Nusantara in East Kalimantan.

Eastern Provinces and Papua

Despite their large land areas, eastern provinces remain  sparsely populated :

The map, which colour-codes each state by its second most spoken language, displays a sea of red-and-yellow Spanish flags stretching coast to coast, from California and Texas to New York and Illinois. Spanish dominates as the most prevalent second language in all but four states.

Only a handful of states diverge:

This trend aligns with U.S. Census Bureau data, which shows over 42 million people in the U.S. speak Spanish at home—the most of any non-English language. Spanish is followed distantly by Chinese (including Mandarin and Cantonese), Tagalog, Vietnamese, and Arabic.

The rise in Spanish language use is not surprising given demographic changes. According to Pew Research Centre :

These numbers reflect a larger trend of sustained bilingualism rather than linguistic assimilation, particularly in urban centres and border states.

The non-Spanish-speaking states reveal rich linguistic and cultural stories of their own:

These figures, visualised in a recent infographic by World Visualized, offer a snapshot of the global population distribution in 2025. With more than 1.45 billion people each, India and China together account for over 35% of the world's population.

The top five countries by population in 2025 are:

These five nations alone make up nearly 46% of the planet's population. Countries like Nigeria (2.78%), Brazil (2.69%), and Bangladesh (2.15%) also feature prominently, reflecting shifting centres of demographic gravity.

According to UN DESA, as of mid-2025, the global population stands at approximately 8.2 billion, with projections indicating a peak of 10.3 billion in the 2080s before a gradual long-term decline begins.

This global slowdown in population growth is part of a broader trend known as the demographic transition. As nations industrialise, urbanise, and expand access to education and healthcare, birth rates naturally decline.

In its latest report, UN DESA notes, “More than two-thirds of the global population now live in countries where fertility rates have fallen below the replacement level of 2.1 births per woman.”

This trend is especially pronounced in countries like Japan (1.53%), Germany (1.04%), and Italy (0.73%), where ageing populations are prompting economic and social reforms.

The future of population power

The demographic momentum in emerging economies is expected to have profound implications:

The map, boldly colour-coded and superimposed on a traditional world map layout, challenges conventional perspectives on global demographics. It provides a stark reminder of where people are concentrated and how dramatically population density varies across the Earth.

A bold visualisation of global inequality

Rather than following traditional lines—continents, countries, or even economic regions—this population-based reorganisation shows:

Each region highlights how certain landmasses, like Australia or Northern Canada, contain vast land but very few people, while others, such as parts of South and East Asia, are incredibly dense.

As Our World in Data and the UN Population Division report, global population surpassed 8 billion in late 2022, and growth rates are increasingly uneven—Africa is seeing a youth boom, while Europe and parts of Asia face ageing populations.

This map puts these dynamics into perspective—visually equating continents that are otherwise unequal in demographic size, and encouraging viewers to reimagine global equity, representation, and environmental impact through the lens of people , not places.

In 1927, Turkey's population stood at approximately 13.6 million . Over the subsequent decades, the country witnessed significant growth, reaching 83.6 million by 2020. This expansion was particularly rapid in the post-World War II era, with annual growth rates peaking at nearly 3% in the early 1960s.

Factors contributing to this surge included high birth rates and internal migration from rural to urban areas. However, by 2020, the growth rate had decelerated to 0.6% annually, influenced by declining fertility rates and an ageing population.

Greece's population plateau and decline

Greece's demographic journey was more complex. Following the 1923 population exchange between Greece and Turkey, Greece's population in 1928 was recorded at 6.2 million. The nation experienced steady growth throughout the mid-20th century, peaking at around 11.1 million in 2010 .

However, the subsequent decade saw a decline, with the population decreasing to approximately 10.7 million by 2020. This downturn has been attributed to low birth rates, economic challenges, and emigration.

The contrasting population trends of Greece and Turkey have significant implications for their respective futures. Turkey's youthful and growing population presents opportunities for economic expansion but also poses challenges related to employment and urban infrastructure.

Greece, on the other hand, faces the challenges of an ageing population and a shrinking workforce , necessitating policy responses to address potential economic and social impacts.

A closer look at the regional fertility map, compiled by The World in Maps from KOSTAT data, reveals significant disparities across the country:

This regional divide highlights the significant disparity between urban and rural reproductive patterns, which are influenced by economic pressures, housing costs, and lifestyle factors that discourage childbearing in densely populated cities.

Experts at KOSTAT attribute the continued decline to multiple interlinked factors:

Despite extensive government efforts—ranging from cash incentives to expanded childcare support—the impact on fertility rates has been negligible. According to KOSTAT’s analysis, policy measures have not kept pace with the root structural challenges that deter young people from starting families.

The government’s latest initiatives, including increased parental leave and housing subsidies, have yet to reverse the downward trend. Analysts warn that without more fundamental reforms—such as improving gender equality, addressing youth unemployment, and rethinking housing policy—the country’s demographic crisis will deepen.

National implications

The implications of South Korea’s record-low fertility rate are profound. With an ageing population and shrinking workforce , the country faces a looming demographic cliff that threatens to strain its pension system, healthcare infrastructure, and overall economic productivity.

Demographers warn that without urgent action, South Korea’s population could begin to contract significantly by the 2030s, placing the country’s long-term economic competitiveness at risk.

As of January 1, 2024, 21.6% of the EU's population was aged 65 or older, up from 21.3% in 2023. Over the past decade, this figure has surged by nearly 3 percentage points, reflecting long-term trends of low birth rates and increasing life expectancy.

At a median of 44.7 years, the EU’s population is now among the oldest globally, and this has significant implications for labor markets, pension systems, and healthcare infrastructures.

The countries with the oldest populations in Europe include:

These aging societies share common demographic traits: prolonged low fertility, rising longevity, and substantial post-war baby boomer populations now entering retirement. In Italy, for instance, the birth rate has dropped to one of the lowest in the world —1.24 births per woman, well below the replacement threshold of 2.1.

On the contrary, several countries in and around Europe still retain significantly younger populations:

Turkey, with the lowest median age on the map, maintains higher birth rates (above 2.0 births per woman) and a significantly younger labor force, offering a contrast to the stagnation faced by aging Western European economies.

Eastern and Central European countries such as Poland (43.0), Romania (43.8), and Hungary (42.5) sit below the EU median but are aging quickly due to mass emigration and declining fertility. The situation is compounded by "brain drain"—a loss of working-age populations to wealthier EU nations.

Meanwhile, Nordic countries like Sweden (41.0) and Finland (43.4) fare better, aided by proactive family policies , gender-equal work environments, and generous childcare benefits that mitigate some effects of ageing.

Uttar Pradesh (2.5%) surpasses the entire populations of Brazil (2.3%), Russia (1.8%), or Japan (1.5%). Maharashtra (1.4%), a single western state, equals the entire population of Mexico, while Bihar (1.3%), often overlooked in international economic discourse, contains more people than Germany.

These states are not just administrative regions—they are demographic giants unto themselves.

What makes this revelation compelling is how it reframes discussions about governance, infrastructure, and climate resilience.

For example, Uttar Pradesh’s 2.5% share of the global population is squeezed into less than 1% of Earth’s landmass.

Additionally, Bihar and West Bengal, each with over 1% of the world ’s population, face chronic underdevelopment, underlining the challenge of scaling public services to meet unprecedented density.

Southern states like Tamil Nadu (0.6%) and Kerala (0.4%), while still massive by global standards, reflect a demographic slowdown, indicating a north-south divide in population growth rates.

Assuming a world population of 8.1 billion , this means:

Leading the list is Niger, where a remarkable 56.9% of the population is under 18, followed by Uganda at 55% and Chad at 54.6%.

Top 10 countries with the youngest populations (by % under 18)

Why are these populations so young?

The youth-heavy populations in these countries are largely driven by high fertility rates, limited access to family planning, and cultural norms that favour larger families. For instance, Niger has one of the world’s highest fertility rates , averaging more than six children per woman. Meanwhile, ongoing improvements in child survival rates and healthcare have led to population booms dominated by young people.

The latest data reveals the top 10 countries with the most citizens living abroad, shedding light on significant demographic and socio-economic trends.

1. India – 18.1 million expats

India tops the list with a staggering 18.1 million nationals living overseas. This vast diaspora is spread across the Gulf countries, North America, Europe, and Australia. Factors driving this include better job prospects, higher education, and family reunification.

2. Mexico – 11.2 million

Mexico follows as the second-highest country of origin for emigrants, with 11.2 million Mexicans residing abroad. The United States remains the primary destination, driven by economic migration and familial connections.

3. Russia – 10.8 million

With 10.8 million citizens living abroad , Russia has seen consistent migration due to both economic and political reasons. Many Russian expatriates have settled in neighbouring countries and Western Europe.

4. China – 10.5 million

China has 10.5 million citizens living outside its borders. Chinese expatriates are heavily present in Southeast Asia, North America, and Europe, driven by business, education, and investment opportunities.

5. Bangladesh – 7.8 million

Approximately 7.8 million Bangladeshis live abroad, mainly in the Middle East, Malaysia, and the UK. Labour migration remains a dominant trend among Bangladeshi expats.

6. Philippines – 6.5 million

The Philippines has 6.5 million citizens overseas, reflecting the country’s long-standing labour export policy. Filipino workers are crucial in global healthcare, hospitality, and maritime sectors.

7. Ukraine – 6.1 million

With 6.1 million Ukrainians living abroad, recent migration trends have been influenced significantly by conflict with Russia and displacement. Many have sought refuge and work across Europe.

8. Pakistan – 6 million

Pakistan reports 6 million expats, primarily located in the Gulf region, the UK, and North America. Economic migration and remittances play a key role in the country’s economy.

9. Indonesia – 4.5 million

Indonesia has 4.5 million nationals abroad, many working in Malaysia, Saudi Arabia, and Taiwan. Labour and domestic work are primary migration drivers.

10. Nigeria – 2 million

Nigeria, with 2 million expats, rounds out the top ten. Nigerian professionals and students have increasingly migrated to North America, Europe, and South Africa .

Global implications of migration trends

These migration patterns are more than just numbers—they reflect broader shifts in labour markets, educational aspirations, political stability, and economic dependency. Remittances sent home by expatriates play a vital role in the GDP of many countries on this list. In addition, diaspora communities serve as cultural and economic bridges between nations.

Colour-coded for clarity, the map shows a vast sea of orange representing countries where Boomers have become the largest generation. Meanwhile, smaller patches of green and yellow indicate where Generation X (1965–1979) and Millennials (1980–1994), respectively, still hold demographic dominance.

The dominance of the Boomer generation in most of Western, Southern, and Central Europe is no surprise. Decades of lower birth rates, longer life expectancy, and the mass aging of the post-war generation have shifted Europe’s demographic center of gravity.

Countries like France, Germany, Italy, and Spain now have Boomers as their largest group, many of whom are retired or approaching retirement. This trend poses significant challenges: shrinking workforces, increasing pressure on healthcare and pension systems, and growing intergenerational economic disparity.

Yet not all of Europe is marching in step with the aging trend. Sweden, Albania, Ukraine, and Turkey stand out in bright yellow as countries where Millennials are still the largest generation. This could be a result of more robust birth rates in the 1980s and 1990s, immigration trends, or outflows of older generations.

Meanwhile, the UK, Ireland, Switzerland, and parts of Eastern Europe remain dominated by Generation X, shown in green. These countries appear to be the demographic "middle ground"—not as young as the Millennial-led nations, but not as elderly as their Boomer-heavy neighbours.

Between 2000 and the mid-2010s, Europe’s overall population continued to grow, but at a slowing pace. According to Eurostat , the population of the EU-27 increased from approximately 474 million in 2000 to around 448 million by 2023 (note: the drop reflects the UK's exit from the EU rather than an actual decline). However, this growth has not been evenly distributed.

Countries like Germany, France, the UK and Sweden in Western and Northern Europe generally saw moderate growth, largely supported by immigration.

In the southern part, Italy, Spain and Greece experienced slower growth or stagnation, with some areas beginning to shrink. Meanwhile, Eastern Europe and the Baltics saw significant population decline, driven by low birth rates, high emigration rates, and ageing populations.

One of the most notable demographic changes in Europe since 2000 is the ageing of the population. The median age in the EU rose from about 38 years in 2001 to over 44 years by 2023. The proportion of people aged 65 and over has steadily increased, while the share of working-age individuals (15–64 years) has declined.

Some countries, like Germany, Italy, and Greece, are facing particularly acute ageing trends, while others like Ireland and France have slightly younger populations due to higher fertility rates and more youthful immigrant populations.

On the other hand, fertility rates across Europe have remained below the replacement level of 2.1 children per woman. Most EU countries have fertility rates between 1.3 and 1.7, with some of the lowest levels seen in Italy, Spain, and Portugal since 2000.

In terms of migration, the post-2004 EU enlargement saw millions of workers move from Eastern to Western Europe. The refugee crisis in 2015 also brought a significant influx of asylum seekers from Syria, Afghanistan, and other conflict zones. To top it up, Labour migration and intra-EU mobility have continued to influence regional demographics, often revitalising urban centres while depopulating rural and peripheral regions.

And then there is Brexit! The United Kingdom’s exit from the EU in 2020 also reshaped Europe’s demographic landscape. The UK had been one of the EU's most populous and fastest-growing countries, largely due to high levels of immigration and a relatively youthful population. Its departure altered both statistical trends and actual migration patterns across the continent.

The annual growth rate has gradually declined over the past decade. In 2015, it was 1.20%, which decreased to 0.97% by 2020. The 2024 growth rate of 0.87% continues this downward trend, indicating a slowing pace of population growth. ​

Asia, however, remains the most populous continent, housing approximately 58.9% of the global population in 2024. Africa's share stood at 18.6%, while Europe accounted for 9.1%. Latin America and the Caribbean represented 8.1% of the world's population, with Northern America and Oceania comprising 4.7% and 0.6%, respectively. ​

The global total fertility rate (TFR) in 2024 was estimated at 2.2 live births per woman. A TFR below 2.1 is typically associated with a declining native population, absent immigration. This decline in fertility rates has contributed to the observed slowdown in population growth. ​

Urbanisation trends also continued, with 57.5% of the global population residing in urban areas in 2024. The overall population density was calculated at 55 people per square kilometer (142 per square mile), based on a total land area of approximately 148.94 million square kilometers (57.51 million square miles). ​

Europe: 77.2 years

Europe boasts the highest life expectancy, with an average of 77.2 years. Countries like Spain, Italy, and Iceland have some of the highest life expectancies globally. This region is projected to approach 83 years by 2050.

Northern America: 76.9 years

Northern America, comprising the United States and Canada, has a life expectancy of 76.9 years. The United States has a life expectancy of 76.1 years, while Canada's is 81.1 years. By 2050, the continent is expected to be attaining 94 years.

Australia and New Zealand: 76.5 years

Australia and New Zealand have a combined life expectancy of 76.5 years. Australia's life expectancy is 75.6 years, while New Zealand's is 80.5 years. Australian and Oceanian elders are given a lifespan of 82.1 years in 2050.

Latin America and the Caribbean: 75.5 years

Latin America and the Caribbean have a life expectancy of 75.5 years. Countries like Chile, Costa Rica, and Cuba have made significant progress in increasing life expectancy. Interestingly, this region aims at 80.6 years by 2050.

Asia: 73.5 years

Asia's life expectancy is 73.5 years, with notable variations across countries. Japan has one of the highest life expectancies globally, at 87.2 years, while Afghanistan's is 64.1 years. By 2050, Asia's life expectancy is expected to approach 80 years.

Africa: 63.5 years

Africa has the lowest life expectancy, at 63.5 years. While some countries like Mauritius and Seychelles have made significant progress, others like the Central African Republic and Chad continue to face challenges. With the withdrawal of many health aids supported by USAID, the figures are likely to decline. The UN, however, sees a leap by 5 years in 2050.

Here are some examples:

In Europe:

1. Luxembourg - 673,036

2. Malta - 539,607

3. Iceland - 393,396

4. Andorra - 81,938 5. Monaco - 39,242

6. Liechtenstein - 39,039

7. San Marino - 34,232

8. Vatican City - 800

In the World:

1. Fiji - 926,276

2. Bhutan - 787,941

3. Guyana - 789,683

4. Comoros - 873,724

5. Solomon Islands - 707,851

6. Suriname - 618,040

7. Brunei - 464,478

8. Barbados - 287,025

Historical migration patterns, economic opportunities, and social factors influence each department's unique demographic composition .

Paris, in the heart of France, hosts a diverse immigrant population. The most prevalent foreign nationality is Moroccan. The Moroccan community has been a significant part of Parisian life, contributing to the city's multicultural fabric.

Seine-Saint-Denis, part of the Greater Paris area, has the highest proportion of immigrants in France. The most common foreign nationality here is Algerian, reflecting the historical ties between France and Algeria, which stem from the colonial period.

Rhône, which includes the city of Lyon, has a substantial immigrant population. The most common foreign nationality in this department is Portuguese. The Portuguese community has a long history in the region, particularly in the construction and service industries.

In the northern department of Nord, the most common foreign nationality is Belgian. The country's proximity to Belgium has facilitated cross-border movement and settlement.

This stark imbalance isn’t a result of natural birth rates; it’s rooted in Qatar’s economic model, which relies heavily on migrant labour to support its booming industries, particularly construction and oil and gas.

According to the  World Population Review , male workers, primarily from South Asia, Egypt, and other developing regions, have flocked to Qatar to fill labour-intensive roles, drawn by the prospect of better pay and stable employment. This influx has fuelled Qatar’s rapid economic growth and urban expansion but has also introduced some unique societal challenges.

The first one is economic implications.   Fewer women in the population often means fewer families are formed, resulting in a lower birth rate and may impact long-term demographic stability. This could pose challenges for Qatar’s sustained economic growth, as a lower rate of natural population increase might create a greater reliance on continual migration to meet workforce demands.

The second challenge is the social challenge. A heavily male-skewed population affects more than just numbers; it can reshape community dynamics. For example, fewer women in society can lead to imbalances in family structures and marital dynamics and even influence social behaviours.

There can also be strains on the traditional support systems and changes in community cohesion, making it harder for the male-dominated population to integrate fully. With a limited number of women in the population, there’s also a risk of family inequality and related issues that could reverberate for generations.

While migrant labour has helped to propel Qatar’s development and diversify its economy, the resulting demographic shift has left a lasting mark on its social fabric. The challenge now lies in balancing economic needs with the social and cultural dynamics that a more balanced population brings.

Qatar’s experience is a reminder of how the pursuit of economic growth through migration can reshape a nation in unexpected ways, and it raises important questions about how to support a balanced society moving forward.

Women voters leaned toward Harris, with 54% casting ballots in her favour, though this margin was narrower than expected. Trump continued to attract more white voters, while Harris retained strong support from Black and Latino communities. However, Trump made significant inroads among Latino men, reflecting shifting dynamics within this demographic.

Young voters largely backed Harris , but her support dropped in key states like Michigan. While Biden captured 61% of the 18–29 demographic in 2020, Harris secured only 46% this year, underscoring a declining enthusiasm among younger voters.

Swing states played pivotal roles in the election's direction. In Wisconsin, Michigan, Pennsylvania, and Georgia, Harris performed well in urban hubs like Madison and Milwaukee, but Trump dominated rural areas. Pennsylvania, holding 19 critical electoral votes, ultimately tipped toward Trump, clinching his victory.

This election also saw a slight dip in support from Black voters for the Democratic ticket. Economic pressures over the past four years may have swayed some, and while Harris’s campaign spotlighted celebrity endorsements, some voters felt that their local concerns were underrepresented.

In contrast to regions where family structures provide a safety net—such as many Asian cultures with deep-rooted familial traditions—Northern Europe’s robust support systems empower individuals to live independently.

Strong economies, high levels of education, and well-established urban centres provide a stable foundation for solo living, making it feasible and attractive. In cities across Germany and Canada, urban life similarly fosters single living, where individuals feel free to prioritise their choices without societal pressures to marry or have children.

For many young adults, marriage has become an option rather than a necessity. Younger generations are delaying or forgoing traditional marriage to pursue career and personal goals, exploring alternatives like cohabitation or communal living.

With evolving gender roles, more women are focusing on career advancement, contributing to rising singlehood rates among professionals.

 While celebrated by many, this trend brings potential challenges. Higher single rates can contribute to lower birth rates, impacting long-term national growth and increasing welfare costs, especially around pensions.

Nevertheless, for now, the choice to live single is an expression of autonomy, with many individuals enjoying the freedom to shape their lives as they see fit.

According to projections by the Pew Research Centre and data from Worldometer, the Muslim population is expected to continue its rapid increase well into the future.

In 2013, the global Muslim population was estimated at 1.63 billion, making up about 23% of the world's population. By 2020, this number had grown to approximately 2 billion, representing nearly 24.9% of the global population.

This growth is largely attributed to higher fertility rates and a younger median age among Muslims compared to other religious groups.

Looking ahead, the Muslim population is projected to grow significantly. By 2030, it is expected to reach 2.2 billion, accounting for about 26.4% of the world's population.

This trend is anticipated to continue, with the Muslim population projected to nearly double by 2050, reaching around 2.8 billion. By then, Muslims are expected to make up 30% of the global population.

The majority of the world's Muslims currently reside in the Asia-Pacific region, which is home to about 60% of the global Muslim population. This region includes countries with large Muslim populations such as Indonesia , Pakistan, and India.

The Middle East and North Africa , while predominantly Muslim, account for about 20% of the global Muslim population. Sub-Saharan Africa is also seeing a significant increase in its Muslim population, projected to rise from 16% in 2010 to 24% by 2050.

This immense demographic scale presents both opportunities and challenges for economic growth, urban development, and resource management.

On the one hand, the country's immense population could drive economic growth and expand markets, while also enhancing its geopolitical influence. On the other hand, it creates substantial pressure on urban infrastructure, resource management, and employment.

On a wider scale, India's population is equivalent to 17.78% of the total world population.

As the world’s second-most populous country, India's growing role in global markets and geopolitics is becoming increasingly evident.