"Unlike puppets," he notes, "we have the possibility of stopping in our movements, looking up and perceiving the machinery by which we have been moved. In this act lies the first step towards freedom." Professor Berger discusses this consciousness in detail, in relation to one's own biography, to the operations of social institutions, and to the makeup of an individual as a product of this institutions. In each instance, he outlines the major contributions to sociology of such classical sociologists as Weber, Pareto, and Drukheim in Europe; Veblen, Cooley, and Mead in the United States; and some of the most important names in the field today.