John Marshall (American jurist)

John Marshall was a prominent American jurist who served as the fourth Chief Justice of the U.S. Supreme Court from 1801 to 1835. He played a crucial role in shaping the American legal system by strengthening the authority of the judiciary and defining the balance of power among the federal government, states, and citizens. Marshall's rulings established important principles, such as judicial review—the power of courts to declare laws unconstitutional—helping to establish the Supreme Court as a co-equal branch of government. His leadership significantly influenced the development of U.S. constitutional law.