The coming decade marks a critical inflection point: advanced economies face simultaneous mass retirement waves that fundamentally challenge existing economic models. As demographics shift dramatically, the post-war economic framework built on continuous workforce expansion and consumption growth hits structural limits. When retirement populations swell while working-age cohorts shrink, traditional fiscal mechanisms strain under pension obligations and healthcare costs. This demographic crisis doesn't just affect individual nations—it cascades through global markets, reshaping asset demand, capital flows, and inflation dynamics. The current economic model, premised on perpetual expansion, collides with demographic reality. Understanding this transition is essential for anyone tracking long-term market trends and financial cycles.