Final answer:
The main idea of the Magna Carta was that monarchs were required to follow the law.
Step-by-step explanation:
The Great Charter is also known as the Magna Carta, and it was a document agreed upon by King John of England in 1215. One of the main ideas of the Magna Carta was that monarchs were now required to follow the law, which limited their absolute power. This was a significant step towards establishing the rule of law and ensuring that even the king was not above the law.
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