The significant achievement of the Magna Carta in 1215 was the establishment of the principle that the monarch's power could be limited by law. Originally created to address conflicts between King John of England and his barons, it asserted that everyone, including the king, was subject to the law. Key provisions included protection of church rights, access to swift justice, and limitations on certain taxes. The Magna Carta is often recognized as a cornerstone of modern democratic principles and rights, influencing subsequent constitutional developments around the world, particularly in the context of due process and legal rights.