The paper seeks to demonstrate the inherently practical intent of the Marshall Lectures. It argues that Parsons' views on the relationship between sociology and economics were presupposed by his broader vision of how the social sciences could contribute to the successful functioning of the social order. This conception of a new division of labor in the social sciences arose from Parsons' concern with the shortcomings of both utilitarian economics and Marxism. Evidence from Parsons' writings of the 1930s and 1940s is provided in support of these claims.