Alan Morton Dershowitz (; born September 1, 1938) is an American lawyer and academic. He is a scholar of United States constitutional law and criminal law who has been described as a “noted civil libertarian”. He began his teaching career at Harvard Law School where, in 1967, at the age of 28, he became the youngest full professor of law in its history. He held the Felix Frankfurter professorship there from 1993 until his retirement in December 2013, and has been a regular media contributor, political commentator, and legal analyst. He is also a prominent voice on the Arab–Israeli conflict and has written a number of books on the subject.
Dershowitz has been involved in a number of high-profile legal cases. As a criminal appellate lawyer, he won 13 of the 15 murder and attempted murder cases which he had handled, and has represented a series of celebrity clients, including Mike Tyson, Patty Hearst, and Jim Bakker. His most notable cases included the successful appeal of Claus von Bülow’s 1982 conviction for the attempted murder of his wife, Sunny, and the 1995 O. J. Simpson murder trial, in which he served on the legal “Dream Team”, alongside Johnnie Cochran and F. Lee Bailey, as an appellate adviser.Dershowitz is the author of a number of books about politics and the law, including Reversal of Fortune: Inside the von Bülow Case (1985), the basis of the 1990 film; Chutzpah (1991); Reasonable Doubts: The Criminal Justice System and the O.J. Simpson Case (1996); The Case for Israel (2003); Rights From Wrongs: A Secular Theory of the Origins of Rights (2004); and The Case for Peace (2005). His two most recent works were both published in 2018: The Case Against Impeaching Trump and The Case Against BDS: Why Singling Out Israel for Boycott is Anti-Semitic.