Final answer:
The Magna Carta is considered a historical document because it limited the power of the king and established legal rights for the subjects. It laid the foundation for modern constitutional law and limited government.
Step-by-step explanation:
The Magna Carta is considered a historical document because it was the first time Britain had ever tried to rein in the power of the king. It was a charter of rights that limited the authority of the monarchy and established certain legal rights for the subjects of the king. While it did not create a government or establish Britain as an official country, it laid the foundation for the principles of modern constitutional law and limited government.
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