This symposium began with a call for papers “reassessing the validity of the Chicago School’s assumptions about competition and considering whether a more aggressive approach to antitrust enforcement is now warranted.” That framing uncritically accepts the premises of antitrust’s new populist movement: first, that “the Chicago School” marked an abrupt break from prior academic analysis of antitrust law, and second, that its adherents shared a common positive agenda fundamentally at odds with robust antitrust enforcement. Both of those premises are false. The Chicago School represented a logical continuation of the antitrust analysis developed over the preceding decades, and its members shared no positive doctrinal agenda. Instead, they shar...