“During the past few decades, marriage has become more associated with socioeconomic status than perhaps at any other time in American history. Marriage has declined substantially among poor people of all races, who are both less likely to marry and more likely to divorce than their counterparts from earlier eras. Meanwhile, the affluent and highly educated are more likely to marry (even if a bit later in life than in earlier eras) and less likely to divorce than their less advantaged counterparts. While college-educated parents tend to delay childbearing until after marriage, less educated women often have children without the benefit of marriage.”