Why Preschool Can Save The World

This is such a powerful piece of reporting. It actually answers the question: 'What should we do?'
Planet Money

On today's show, we meet a self-described robber baron who decided to spend his billions on finger paint and changing tables. We revisit decades-long studies that found preschool made a huge difference in the lives of poor children. And we talk to a Nobel prize-winning economist who says that spending public money on preschool produces a huge return on investment.