Tripping on the Color Line: Black-White Multiracial Families in a Racially Divided World - Paperbackby Heather M. Dalmage (Author) At the turn of the twentieth century W. E. B. DuBois predicted that the central problem facing the United States in the new century would be that of the "color line." Now, at the beginning of a new century, we find many people straddling the color line. These people come from the growing number of multiracial families in America, families who search for places of comfort and familiarity in a racially polarized society