This is the Executive Summary for "The State of the World's Children 2024: The Future of Childhood in a Changing World," which looks ahead to the year 2050. It asks: How can we best secure a future where the rights of every child are realized -- a world where all children survive, thrive and meet their full potential? This report examines three powerful, long-term global forces -- megatrends -- that will profoundly affect children's lives between now and 2050: demographic shifts, climate and environmental crises, and frontier technologies.