The effects of racism have left well-educated black women with a paucity of black male partners: According to Brookings Institute data, black men are less likely than black women to have completed high school and 50 percent less likely to have attained a four-year college degree. Yet despite the shortage of suitable black partners, black women have also been the least likely of any minority group to marry outside of their race, according to data from the Pew Research Center.