These nations include China, India, the United States, Indonesia, Pakistan, Nigeria, Brazil, Bangladesh, Russia, Mexico, Ethiopia, Japan, the Philippines, and Egypt, an eclectic mix of economic powerhouses, emerging markets, and developing nations that collectively influence global decisions on trade, climate, security, and migration.

India and China alone account for over one-third of all humans, but their demographic paths are diverging rapidly. India has officially surpassed China as the world’s most populous nation, a milestone confirmed in the UN’s 2023 World Population Prospects.

India ’s median age is just 28, compared to China’s 39, giving it a much larger working-age population and potentially shifting economic influence in Asia.

Economists, including analysts at the International Monetary Fund, note that this workforce advantage could help India accelerate industrial growth if job creation and education keep pace.

Africa’s largest populations, Nigeria and Ethiopia, are expected to grow dramatically over the next three decades. Nigeria alone could surpass 375 million people by 2050 to become the world’s third most populous nation . The World Bank warns that rapid growth without matching investment in infrastructure, food systems, and education could strain resources, but it also points to Africa’s youth as an engine for innovation and entrepreneurship in a world facing labour shortages elsewhere.

On the other side of the spectrum are countries like Japan and Russia, where populations are shrinking. Japan’s fertility rate remains one of the lowest in the world, and its population is ageing faster than any other major economy.

Russia faces a similar demographic decline, further impacted by migration and the consequences of the war in Ukraine. Both countries illustrate the serious economic and social challenges tied to shrinking labour forces, from reduced productivity to increasing pressure on healthcare and pension systems.

These demographic realities are shaping today’s global news. At recent G20 , UN, and COP28 meetings, leaders acknowledged that population trends directly affect climate negotiations, energy planning, and economic cooperation.

South Sudan leads the continent with a staggering 34.4% projected GDP growth, fueled by a rebound in oil production and renewed peace efforts. Years of political instability had suppressed output, but recent developments suggest stabilisation is unlocking long-dormant economic potential. This exceptional rate, however, also reflects a base effect—growth rebounding from a low starting point.

In Senegal, the economy is forecast to grow by 8.6%, driven by its offshore oil and gas sector, set to come online in 2025. The G rand Tortue Ahmeyim gas project is expected to be a game-changer, attracting foreign investment and boosting fiscal revenues. Senegal's diversified strategy—including agriculture, fintech, and infrastructure—is earning global investor confidence.

Uganda comes in third with 7.2% growth, benefitting from infrastructure expansion and anticipated oil production starting in 2025. The AfDB underscores Uganda's investment in energy and transport corridors as key to stimulating trade and productivity.

Rwanda, long considered a reformist beacon, is expected to grow 7.1%, supported by strong tourism recovery, digital innovation policies, and ongoing public investment. Its performance reflects the East African region's broader momentum, which the AfDB forecasts will average 6.1% growth by 2026, with half its economies growing above 5%.

Niger, Togo, and Djibouti all project 6.9% growth, each leveraging different economic strategies:

Ethiopia and Benin are tied at 6.6%, with Ethiopia recovering from internal conflict and doubling down on industrial parks and manufacturing exports. Benin, meanwhile, is reaping benefits from trade liberalisation and regional integration policies.

Côte d'Ivoire rounds out the top 10 at 6.3%, reflecting strong agricultural exports , ongoing infrastructure development, and a stable investment climate.