Our ability to live for decades may seem like a modern luxury made possible by clean water and advances in medicine. In fact, human longevity is a legacy of our unique evolutionary path as a species. “Seven Decades” challenges the belief that life in the past was “nasty, brutish, and short,” tracing how our capacity for long life came to be and transforming how we think about aging. Blending vivid storytelling with cutting-edge science, anthropologist Michael Gurven weaves tales from his year