Clarence Thomas (born June 23, 1948) is an American jurist. He has served as an Associate Justice of the Supreme Court of the United States since 1991, the second African American to serve on the nation's highest court (after Justice Thurgood Marshall, whom he succeeded). Appointed by President George H. W. Bush, Thomas's career in the Supreme Court has seen him take a conservative approach to cases while adhering to the principle of originalism