The Magna Carta was created in 1215 and forced King John to obey the same laws as his subjects, establishing equality under the law. Dissatisfied barons rebelled in response to the king raising taxes without permission. They compelled the king to agree to the Magna Carta's limitations on royal power through clauses protecting individual liberties and access to fair trials. While only three clauses remain valid law today, the Magna Carta established principles of shared rule of law and equal treatment that continue influencing modern legal systems.