Perpetrators of intimate partner violence (IPV) use coercive actions toward intimate or formerly intimate partners, including emotional abuse, stalking, threats, physical violence, or rape. The lifetime prevalence of IPV is 35% for women and 28% for men, with at an estimated economic cost of over ten billion dollars. IPV occurs in all demographic sectors of society, but higher frequencies of IPV perpetration are found among people who are younger and who have lower income and less education. Similar proportions of men and women use IPV, but when the effects of partner abuse are considered, women bear the greatest physical and behavioral health burden. Single-explanation causes for IPV such as substance abuse, patriarchy, and personality disorders are sometimes preferred by practitioners, advocates, and policymakers, but an understanding of IPV perpetration is enhanced when we look through the multiple lenses of culture and society, relationship, and psychological characteristics of the perpetrators.