The Endangered Species Act, which turned 50 years old on December 28, 2023, has been described as one of the most potent environmental law statutes ever enacted. In this episode, Harvard Law Professor Richard Lazarus and Andy Mergen, director of the Emmett Environmental Law and Policy Clinic at Harvard Law School, discuss the initial bipartisan support for the act, the Supreme Court cases that shaped its implementation, and the success of the law in protecting numerous species. They also talk about how the Endangered Species Act could be improved and the risks that it may face in the future.