The Magna Carta, signed in 1215, was significant in limiting the power of the monarchy and laying the groundwork for constitutional governance in England. While it primarily addressed the grievances of rebellious barons towards King John, it introduced the idea that even the sovereign was not above the law. This document established fundamental legal principles, such as due process and the right to a fair trial, that would influence the development of constitutional law and parliamentary democracy. Although initially focused on feudal rights, its legacy is seen as a cornerstone for modern human rights and the rule of law, impacting governance worldwide.