Good nutrition is the bedrock of human well-being. Before birth and throughout infancy, good nutrition allows brain functioning to evolve without impairment and immune systems to develop more robustly. For young children, good nutrition status averts death and equips the body to grow and develop to its full potential. Over the course of the human lifespan, it leads to more effective learning at school, better-nourished mothers who give birth to better-nourished children, and adults who are likelier to be productive and earn higher wages. In middle age, it gives people metabolisms that are better prepared to ward off the diseases associated with changes in diet and physical activity. Without good nutrition, people’s lives and livelihoods are built on quicksand.