" Needless to say, this fragile experiment began by taking for granted the ugly conquest of Amerindians and Mexicans, the exclusion of women, the subordination of European working-class men and the closeting of homosexuals. These realities made many of the words of the revolutionary Declaration of Independence ring a bit hollow. yet the enslavement of Africans -- over 20 percent of the population -- served as the linchpin of American democracy; that is, the much-heralded stability and continuity of American democracy was predicated upon black oppression and degradation. Without the presence of black people in America, European-Americans would not be " white -- they would be only Irish, Italians, Poles, Welsh, and others engaged in class, ethnic, and gender struggles over resources and identity. "