Behave: The Biology of Humans at Our Best and Worst
by Robert M. Sapolsky (Penguin, 2017); audiobook read by Michael Goldstrom (Penguin Audio, 2018)
A monumental but very readable explication of the many biological factors (from immediate brain chemistry right back to evolutionary development) that determine human behaviour at both an individual and a societal level. Self-aware and with a focus on achieving betterment through understanding.