The Magna Carta, or Great Charter, is a foundational royal charter signed by King John of England and rebellious barons in 1215, setting forth principles of justice, constraints on monarchical authority, and safeguards for the church and nobility. Historians and legal experts, such as William Sharp McKechnie, have highlighted its symbolic function as a token of freedom, while Upton Sinclair praised it as a force for universal legal fairness.
Hugo Black connected its tenets to constitutional due process, emphasizing its lasting impact on contemporary legal frameworks. Although its original provisions were later revised, the Magna Carta continues to serve as a powerful emblem of individual liberties and the rule of law, influencing constitutional ideas from England to the United States.