What are the motifs in A Primate's Memoir by Robert M. Sapolsky?

Social life is a recurring idea in the story. By training, Robert Sapolsky is a neuroendocrinologist. During the time described by the book, Robert studied the chemical component of stress in baboons so as to gain insight into the neurological functioning of humans during periods of stress because he believed that stress could lead to physical problems, which was a controversial view at the time. His scientific work backed up in this claim. Baboons that lived at the bottom of the hierarchy tended to be more stressed out and less healthy as a result.