Robert Sapolsky, a professor of biology at Stanford University and author of the bestseller “The Biology of Good and Evil,” presents a brilliant collection of essays on various aspects of behavioral biology. Is testosterone the cause of aggression—or does the level of this hormone rise during aggressive behavior? Is passion for spying unique to humans? Can stress kill? And what can we do to survive? Which brain areas are connected to sexual orientation, and what affects the timing of adolescent puberty? Why do we drift away from our parents? How are behavior and social status related? Why do we feel so bad when we’re sick? And how many “selves” can live in one body? The author examines such diverse and fascinating questions in detail from a scientific perspective, clarifying them concisely, with humor, and backing up the conclusions with the results of large-scale studies and experiments. Sapolsky is precise and sharp-witted; his reasoning is deep and yet very understandable. He is not only an excellent scientist, but also a talented writer. This audiobook, illuminating the universal interconnectedness of the inhabitants of Earth, is further proof of that.