Such experiences make working-class women distrust men in general. They still have babies with men, but they seldom marry them. A whopping 50% of births to American women without college degrees are non-marital, but only 6% of births to college graduates are. Similar trends can be seen in Europe. In Britain 90% of professional couples wait until they are married before having kids, compared with only half of those who earn the minimum wage. Looking at eight European countries, Brienna Perelli-Harris of the University of Southampton and others found that the less educated a mother is, the more likely she is to have a baby outside marriage.