Shep McKenney has spent his life seeking what we all seek - happiness. In A Life's Work he candidly shares his experiences of "having it all" in his professional and personal life yet feeling profoundly unfulfilled. Having all he knew to want, what was missing? This intimate memoir examines that question and its surprising answer. By exploring the traditional paths of religion, philosophy, and science through the lens of his life experiences he came to understand that the underlying barrier to our contentment is the disconnect between what our brains were designed to cope with in the primitive world and what we want in the modern world. With thought provoking stories and intensely personal vignettes, he reveals lessons and practices we can all use to keep our brains from sabotaging our happiness.