The world is experiencing a massive demographic shift, with about two-thirds of humanity now living in countries where fertility rates are too low for generations to replace themselves. This trend has led to rapidly aging workforces globally, with shrinking populations already visible in parts of Europe and dependency ratios climbing steeply in regions like Italy, Greece, Portugal, and Spain.
Costs and Benefits of Aging
Similar demographic transformations are occurring in Latin America—including in Cuba, Puerto Rico, Costa Rica, and Colombia—and across parts of Asia such as China, South Korea, Taiwan, and Thailand. North America’s population is projected to grow and age more moderately, largely sustained by immigration. While organizations like the International Monetary Fund warn that fewer available workers and dropping participation rates will cause economic output to fall, demographic changes can also foster opportunities if institutions adapt and invest in the right technologies.
Political dynamics shift as aging populations increase the electoral power of older generations, complicating pension politics in countries like Italy, Portugal, and Spain, where public pension obligations are expected to exceed 15% of GDP by 2045. Aging societies may also struggle to build consensus on long-term investments like green transitions, as seen in the age divide during the United Kingdom’s 2016 Brexit referendum, where older voters favored leaving the European Union while younger demographics voted to remain.
Historically, expanding youth populations have not guaranteed consensual politics either. Research involving economists Leopoldo Fergusson and Simon Johnson examining developing countries after World War II revealed that sharp mortality declines and population booms led to greater domestic conflict, civil wars, and fierce competition over resources in nations with weak institutions, such as Ecuador, El Salvador, Guatemala, Peru, the Philippines, and oil-rich Nigeria.
A Path Forged by Technology
When populations surged in the 1950s and 1960s, economic investments failed to keep pace with the growing labor force, leading to a slowdown in per capita income growth. Conversely, historical evidence from the past 70 years indicates that where birth rates fell in industrialized nations, GDP did not suffer, and per capita incomes grew more rapidly as societies avoided the resource competition that plagued younger populations.
Countries experiencing faster aging have invested heavily in automated machinery and robotics to combat worker shortages and boost productivity. Industries such as automobile, chemical manufacturing, and machine-tool production in labor-scarce economies like Germany, Japan, and South Korea significantly increased exports during the 2000s and 2010s due to these technological adjustments.
Further research involving economists David Autor, Keelan Beirne, and Andrew Scott demonstrates that lower birth rates over the past seven decades have not caused slower economic growth. Overall GDP remained largely unaffected, translating directly into significantly higher income per capita. Similarly, United States labor markets with larger drops in birth rates experienced higher aggregate earnings and wage growth for workers.
Despite these promising trends, economic research emphasizes that higher productivity stems directly from technological investments and adjustments. Without continued investments as populations age, past performance does not guarantee future success. Furthermore, demographic changes place heavy strains on institutions, and while technologies like artificial intelligence hold tremendous promise, their productivity dividend has yet to fully materialize.
Industrialized economies facing high public debt must also address increasing pension and healthcare expenditures as populations age, potentially requiring new political coalitions where younger and older generations compromise on public spending and pension reforms. Although shrinking populations might alter how societies view future challenges like planetary health, flexible democratic institutions can help articulate new aspirations as the work to shape future inheritance begins today.
