What aspect of a ruler's power is emphasized in the idea articulated in the Magna Carta?

The idea articulated in the Magna Carta focuses on placing limitations on the power of the ruler, signifying a foundational step in the establishment of constitutional governance. By agreeing to the Magna Carta in 1215, King John of England acknowledged that even monarchs were subject to the law, thereby restricting their authority and protecting certain rights of the nobility and, by extension, the populace. This document laid the groundwork for the development of parliamentary democracy and the principle that no one, including the king, is above the law. Thus, the emphasis is on the concept that royal power has boundaries, which was a revolutionary idea at the time.

The other options suggest ideas that do not reflect the core message of the Magna Carta. Unrestricted authority implies absolute power, which the Magna Carta actively opposes. The divine right of kings suggests that monarchs are chosen by God and cannot be challenged, a concept which the Magna Carta undermines by instituting legal limits. Economic control over subjects does not capture the essence of the document, as its primary focus was on the governance and rights rather than economic dynamics.