What might be called, perhaps somewhat grandiloquently, the Epistemological Question has received rather scant attention at the hands of economists. There are, of course, a number of epistemological questions, some of which lie more in the province of the philosopher than they do the economist or the social scientist. The one with which I am particularly concerned here is that of the role of knowledge in social systems, both as a product of the past and as a determinant of the future.