Ralf Dahrendorf (1959)
The concept of class has never remained a harmless concept for very long. Particularly when applied to human beings and their social conditions it has invariably displayed a peculiar explosiveness. The logician runs no risk in distinguishing “classes” of judgments or categories; the biologist need not worry about “classifying” the organisms with which he is concerned—but if the sociologist uses the concept of class he not only must carefully explain in which of its many meanings he wants it to be understood, but also must expect objections that are dictated less by scientific insight than by political prejudice. As Lipset and Bendix have stated: “Discussions of different theories of class are often academic substitutes for a real conflict over political orientations” (55, p. 150).