features that will undermine the success of the in-group. This has the effect of tightening the bonds within the group. Next, convince the in-group that those undesirable qualities make the others less-than- human and barely nonhuman. Next, make sure that the nonhuman mascot for the out-group is vile, abhorrent, and disgusting. This ingredient is critical as it guarantees that each member of the in-group will feel a surge of disgust every time it sees or hears of the out-group. Once disgust is in motion, there is only one additional step: either destroy or purge the other of its vile qualities. Destruction is not only permissible, but morally obligatory, carried out guilt-free because the mind has taken the other out of the moral domain and into the domain of property — either dispensable, controllable or transformable. Taking out the other is rewarding. Harm feels good. Our uniquely promiscuous minds invented dehumanization, using a recipe of adaptive ingredients — defense against an enemy, disgust as a response to noxious and unhealthy substances, and creative language use. This is a dangerous idea, one I develop in chapter 3. It is one of many capacities that enabled us to uniquely imagine new ways of inflicting excessive harm on others. It is a capacity that, nonetheless, has a deep evolutionary history. HARMING OTHERS, version 1.0: non-lethal behavioral routines All animals are motivated to secure resources that will enable them to survive and reproduce. At the most basic and universal level, this is what life is all about. Gaining access to resources enables individuals to accrue more resources, live longer, and produce more offspring. The path to acquiring resources 1s complicated by two facts of life that were central to Darwin’s insights into the process of evolution: resources are limited and individuals must compete with others from the same and different species for these resources. Competition is the breeding ground for aggression — the most basic me