Demographic shifts in Latin America signal a forthcoming decline in population growth, posing significant challenges for the region’s economic and social structures. Recent analyses highlight that many countries in the Western Hemisphere are experiencing fertility rates below replacement level, a trend that could reshape labor markets and public welfare systems in the coming decades.

Economists Jesús Fernández-Villaverde of the University of Pennsylvania and Patrick Norrick of Northwestern University examined global demographic data in their paper, “Terra Incognita: The Economics of a Shrinking World.” They note that the decline in fertility rates is particularly pronounced in low- and middle-income countries, including large parts of Latin America and Asia, regions once expected to generate substantial workforce expansions. For example, in 2025 Mexico’s total fertility rate was 1.51 births per woman, below that of non-Hispanic whites in the United States, which stood at 1.57. Colombia’s rate fell even further to 1.01, while Brazil reported 1.52 births per woman despite having significantly lower GDP per capita than the U.S.

This downward demographic trend contrasts with earlier assumptions that population growth would predominantly be a concern in developing regions. Fernández-Villaverde and Norrick attribute the shift to multiple social factors, including higher costs associated with larger families, delays in marriage and childbirth, and evolving societal norms. One notable observation is that countries with greater gender equality tend to maintain higher fertility rates, a dynamic that may partly explain why the U.S. exceeds many of its Latin American neighbors in this metric.

The anticipated population decline carries important implications for Latin America’s economic future. These countries face the possibility of aging populations preceding substantial gains in income and development, potentially straining pension systems and public healthcare structures reliant on a younger demographic base. Attempts to counteract falling birth rates through government subsidies have shown limited effectiveness in other parts of the world, such as Italy, leaving policymakers with few proven strategies.

Globally, the authors forecast that world population will peak around 9 billion by the middle of the 21st century before entering a phase of gradual decline, a phenomenon not previously observed outside major crises like wars or pandemics. While the shift toward smaller families in developing regions marks a departure from long-standing demographic patterns, it also invites new approaches to economic and social planning.

As Latin America prepares for these demographic changes, experts stress the importance of adapting welfare policies and labor market expectations to a future with fewer young workers. Though a smaller population may ease some environmental pressures, sustaining social safety nets amid shrinking workforces will be a critical challenge for the region’s governments and private sector alike.