Now in its third edition, Robert M. Sapolsky's book, Why Zebras Don't Get Ulcers, includes new chapters on the effects of stress on sleep and addiction, as well as new insights into anxiety and personality disorders and the impact of spirituality on stress management. As Sapolsky explains, most of us don't lie awake worrying about whether we have leprosy or malaria. Instead, the diseases we fear—and those that plague us—are conditions that result from the gradual accumulation of damage, such as heart disease and cancer. When we worry or experience stress, our bodies activate the same physiological responses as an animal, but we don't resolve the conflict in the same way—through fighting or fleeing. Over time, this activation of the stress response literally makes us sick. Combining groundbreaking research with a dose of good humor and practical advice, Why Zebras Don't Get Ulcers explains how prolonged stress causes or exacerbates a range of physical and mental ailments, including depression, ulcers, colitis, heart disease, and more. It also provides essential guidance on controlling our stress responses. This new edition promises to be the most comprehensive and engaging yet.