THE term, “colonialism,” it is easy to illustrate, is a rich and varied source of metaphor for the situation of the Negro in the United States. The metaphor is used not simply by advocates of Black Power, but also by civil rights moderates and some leading social scientists who wish to point up difficulties in communication between whites and nonwhites as well as the disparity in status, power, and rewards. For Kenneth Clark, “The dark ghettos are social, political, educational and— above all—economic colonies.” And Nathan Glazer and Daniel P. Moynihan write...