Today, one in every four children under the age of five in the world—nearly 170 million in total—is physically or mentally stunted. In the past few years, devastating food crises and new research on the economic and social costs of childhood hunger have inspired an international movement to end malnutrition in the first 1,000 days, from conception to a child’s second birthday. Proper nutrition during these 1,000 days can profoundly influence an individual’s ability to grow, learn, and work, and determine a society’s long-term health and prosperity. Through compelling stories of new mothers and babies in Uganda, India, Guatemala, and Chicago, award-winning journalist and anti-hunger advocate, Roger Thurow, brings the 1,000 days to life and illuminates the science, politics, and progress of the movement to end childhood malnutrition. Thurow, a senior fellow at the Chicago Council on Global Affairs, discusses his new book, The First Thousand Days, with international development experts Tom Arnold and Catherine Bertini.