Evolutionary psychologists have long maintained that humans’ moral sense is essential to their success as a species and part of what makes humans unique among animals. Moral systems have functional roots, helping individual organisms survive, thrive, and pass on their genetic material. It is not despite anarchy but because of anarchy that humans have an ethical sense. Evolutionary theorists identify moral condemnation and binding morality as crucial for the emergence of other-regarding, altruistic behavior that makes liberal morality possible in the first place. When others harm us, or even third parties, we condemn, passing moral judgments and sometimes retaliating; we do not speak evil but speak of evil. Moral condemnation encouraged the development of moral conscience to avoid the outrage of, and often violent group punishment by, those who were wronged. This internalized sense of right and wrong in turn acted as a credible signal of cooperativeness that unwittingly and unconsciously paid material dividends. Group favoritism, also thought to have evolutionary origins, is moral in nature as well. Those early humans who felt obligated to contribute to the collective defense against common threats in an extremely dangerous environment could prosper enough to offset the competing incentives to free-ride within the group.