Population decline was once considered a problem exclusively for wealthy, aging societies. It is now spreading rapidly across the income spectrum, and its economic consequences are becoming impossible to ignore. Countries with shrinking populations face labor shortages, rising dependency ratios (fewer workers supporting more retirees), fiscal pressure on pension and healthcare systems, and potentially declining domestic demand.
East Asia presents the most extreme cases. South Korea's fertility rate of 0.7 means each generation is roughly one-third the size of its predecessor. Japan has been shrinking since 2008 and will lose roughly 30% of its population by 2060 under current trends. China's population began declining in 2022, decades earlier than projected, and its one-child policy legacy means the decline will accelerate rapidly.
Eastern Europe's population decline combines low fertility with emigration. Since EU accession, millions of young workers from Poland, Romania, Bulgaria, and the Baltics have moved to Western Europe for higher wages. This "brain drain" accelerates the demographic decline of sending countries while moderating the aging of receiving countries. Ukraine's population has declined by an estimated 10+ million since 1993, driven by low fertility, emigration, and now conflict-related displacement.
The economic implications are profound. A shrinking workforce means GDP growth must come entirely from productivity improvements, which requires sustained investment in automation, AI, and human capital. Japan's experience suggests that technological adoption can partially compensate for workforce decline, but the adjustment is slow and uneven across sectors.