Alan Morton Dershowitz is an American lawyer and academic. He is a scholar of United States constitutional law and criminal law and 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 subsequently became a regular media contributor and political and legal analyst. He is also a prominent commentator on the Arab–Israeli conflict and has written a number of books on the subject.