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When are we responsible for our own actions, and when are we in the grip of biological forces beyond our control? This intriguing question is the scientific province of behavioral biology, a field that explores interactions among the brain, mind, body, and environment that have a surprising influence on how we behave—from the people we fall in love with, to the intensity of our spiritual lives, to the degree of our aggressive impulses. In short, it is the study of how our brains make us the individuals that we are. Biology and Human Behavior: The Neurological Origins of Individuality, 2nd Edition, is an interdisciplinary approach to this fascinating subject. In 24 lectures, you will investigate how the human brain is sculpted by evolution, constrained or freed by genes, shaped by early experience, modulated by hormones, and otherwise influenced to produce a wide range of behaviors, some of them abnormal.