SMU Dedman School of Law professor Joanna L. Grossman and Stanford Law professor emeritus Lawrence M. Friedman trace the historical and legal evolution of adultery laws in the United States, from colonial-era capital punishment through state-by-state criminalization to the recent 2024 repeal of New York’s adultery law. Professors Grossman and Friedman argue that while adultery has gradually been decriminalized across most states and is rarely prosecuted even where it remains illegal, it continues to have social significance and limited legal relevance in specific contexts like military justice, bigamy laws, and civil matters such as divorce proceedings.