Sandra Day O'Connor

On March 26, 1930, in El Paso, Texas, Sandra Day O'Connor was born into a ranching family whose life crossed Arizona and the wider Southwest. She studied at Stanford University and Stanford Law School, where she graduated near the top of her class but faced restricted hiring opportunities because she was a woman. State legislative and judicial service in Arizona gave her a practical, institution-minded approach to law.

O'Connor became the first woman on the Supreme Court in 1981 after nomination by Ronald Reagan. She often cast the decisive vote in cases involving abortion, affirmative action, religion, and federalism, including Planned Parenthood v. Casey in 1992. Her style emphasized balance, incrementalism, and the Court's legitimacy during years of partisan and constitutional change.

O'Connor's appointment changed public expectations about women in the judiciary and in national constitutional leadership. Her opinions remained central to later conflicts over abortion, states' rights, and the role of moderating justices on a polarized Court.