A new science of human behavior has emerged over the past two decades. This new science has linked together the research of neuroscientists, cognitive and evolutionary anthropologists, decision theorists, social and cross cultural psychologists, cognitive scientists, ethnologists, linguists, endocrinologists, and behavioral economists into a cohesive body of research on why humans do what they do. Research in this field rests on two propositions about the human mind. The first, that the mind is embodied; the second, that it is evolved.
Violence remains an uncomfortable if necessary part of the profession of arms. As the United States has shifted to more limited ways of conducting war, so too have our views on the appropriate application of force. Seminal works like On Combat and On Killing by David Grossman began the discussion of how soldiers are trained for war and killing, and offer an organizational perspective on how individuals can be trained for violence. These books operate on the questionably documented assertion that humans are inherently reluctant to engage in violence.