Professor Barnes responds to William Curran's fictional dialogue between Senator John Sherman and philosopher John Rawls, with a fictional letter from Supreme Court Justice William O. Douglas. Professor Barnes discusses the importance of the anarcho-socialist movement of the late nineteenth century to the adoption of the Sherman Act, the historical and logical inevitability of adoption of a rule of reason in antitrust law, the relevance of efficiency to the rule of reason, and the relationship between competition and the promotion of democratic ideals.