Although the Progressive Era has drawn the attention of countless scholars, few historians have deeply investigated one of the most important Supreme Court cases of the era, Muller v. Oregon (1908). It was not until the failure of the Equal Rights Amendment (ERA) in 1972 that scholars seriously considered the case. The failure of the ERA brought a surge of scholarship from the field of history, law, sociology, psychology, and communications. This historiography examines the reemergence of interest in Muller v. Oregon in the years following the ERA’s failure. In addition to examining the increasing interest of scholars, this historiography also considers the method in which secondary school educators should teach the Muller case. Should Mull...