The Magna Carta was the first written document presented to King John of England by his subjects intended to restrict his power and protect their rights. Historians consider it a major milestone in the history of constitutional law.
From 1209 to 1215, a series of unsuccessful military campaigns abroad, high taxes at home and conflicts with Pope Innocent III had made King John of England very unpopular. Rebellious barons conspired to force King John into signing the Magna Carta. The document guaranteed freedom for the English Church, protection of the law for all free men and freedom from excessive fines and taxation.