It has now been more than 50 years since H. L. A Hart and Lord Patrick Devlin first squared off in perhaps the most celebrated jurisprudential debate of the twentieth‐century (1959–1967). The central issue in that dispute—whether the state may criminalize immoral behavior as such—continues to be debated today, but in a vastly changed legal landscape. In this article I take a fresh look at the Hart‐Devlin debate in the light of five decades of social and legal changes.