Along with the many benefits of leisure-class living comes obesity and its attendant ailments. In The Warrior Diet, Ori Hofmekler looks not forward but backward for a solution-to the primal habits of early cultures such as nomads and hunter-gatherers, the Greeks, and the Romans. Based on survival science, this book proposes not ordinary dietary changes but rather a radical yet surprisingly simple lifestyle overhaul.

Drawing on both scientific studies and historical data, Hofmekler argues that robust health and a lean, strong body can best be achieved by mimicking the classical...