Latest 2024 UN data show that populations are declining faster than initially expected in mature economies around the world and nearly 1/4 of the world's population already lives in countries with declining populations. A resulting Demographic Dilemma — a shrinking productive labor pool tasked with supporting an aging population — has potential to impact multiple Sustainable Development Goals and drive a wider opportunity set for Social Investing. Goldman Sachs Research assesses the investment implications of this global trend, and five potential responses from companies and governments.