The Magna Carta was signed in 1215 and is regarded as a pivotal document in the evolution of constitutional governance. Its signing marked the first step toward limiting the powers of the monarchy and establishing the principle that everyone, including the king, is subject to the law. The Magna Carta introduced ideas such as due process and the right to a fair trial, which influenced future democratic governing systems, notably in England and the United States. It laid the groundwork for individual rights and liberties, reflecting a shift towards more representative forms of government.