Whether you call it “domestic violence,” “partner violence” or “intimate partner violence” there is one key reality: It’s everywhere. Every country and every culture. Every faith. Every education and economic level. Old and young. Men and women. Of the 115 countries for which we aggregated the most recent data, the lowest prevalence rate is 5 percent. But 80 of these countries (just over two-thirds of them) have a rate at or above 20 percent. That means that, in many countries, at least one in five women have experienced violence at the hand of their partner.