Introduction. Information is power. In a society organized according to principles of rationality and justice, information will be universally available and widely diffused, permeating the social order with power. In a society organized according to capitalist principles, information will be concentrated in the hands of a ruling class and its agents, augmenting and even displacing the force required to maintain capitalist inequities. The burden of the following essay is to argue that differences in information – information differentials – are intrinsic to the capitalist mode of production; and that under free market capitalism this mode of production is reproduced in the post-investment redistribution of profits among corporations, itself largely determined by information differentials; and finally, that in America the corporate sector as a whole maintains its hegemony only by concealing from the public the most basic features of domestic politics, foreign affairs, and the system of criminal justice. In short, information differentials both define and critically conceal the distribution and exercise of power throughout the American political economy.