Does a kindly, charitable interest in others have health benefits for the agent, particularly when coupled with helping behaviours? Although the answer remains unclear, researchers have established that there is an association between generous emotions, helping behaviour, and longevity. Increasingly, emotional states and their related behaviours are being studied by mainstream scientists in relation to health promotion and disease prevention. If helping affect or behaviour can be linked with health and longevity, there are significant implications for how we think about human nature and prosperity. Although studies show that those who are physically or psychologically overwhelmed by the needs of others do experience a stressful burden that can have significant negative health consequences, little attention has been given to whether there are health benefits from helping behaviour that is fulfilling, not overwhelming. In this book, Stephen Post brings together distinguished researchers from basic science to address this question in objective terms. The book provides heuristic models, from evolution and neuroscience, to explain the association between altruism and health, and examines potential public health and practical implications of the existing data.