The political significance of the Magna Carta, signed in 1215, was monumental in limiting the powers of the monarchy and establishing the principle that everyone, including the king, was subject to the law. This document laid the groundwork for constitutional law and individual rights, influencing future political developments, such as the English Bill of Rights and the U.S. Constitution. By asserting that the ruler could not exert absolute power without accountability, the Magna Carta promoted the concepts of due process and consent of the governed, profoundly shaping democratic principles worldwide.