In a world saturated with promises of transformation through discipline and denial, Harvard evolutionary biologist Daniel Lieberman offers a quieter, more honest reckoning: our bodies were never designed to surrender their reserves easily, and the long history of human survival is precisely why modern dieting so reliably fails. His new book, Fed Up, invites readers not toward another regimen, but toward a more compassionate and scientifically grounded understanding of why the body resists, and why that resistance is not a personal failing but a biological inheritance millions of years in the m