jats:pPresent-day advocates of antitrust reform referred to as “New Brandeisians” have invoked history in pressing the case for change. The New Brandeisians bemoan the upending of a mid-twentieth-century “golden age” of antitrust by an intellectual movement known as the Chicago School. In fact, mid-twentieth-century enforcement of antitrust was uneven and large corporations exercised substantial market power. The Chicago School also was not as decisive an agent of change as the New Brandeisians suggest. Doubts about the efficacy of government regulation and concerns about foreign competition did much to foster the late twentieth-century counterrevolution that antitrust experienced.</jats:p>