In the 1950s, America was seen as a vast melting pot in which white ethnic affiliations were on the wane and a common American identity was the norm. Yet by the 1970s, these white ethnics mobilized around a new version of the epic tale of plucky immigrants making their way in the New World through the sweat of their brow. Although this turn to ethnicity was for many an individual search for familial and psychological identity, Roots Too...