Final answer:
The Magna Carta was a document that codified the principles of due process and established the relationship between the king and the nobles in England. It made it impossible for King John to do anything but sign the Magna Carta because he had been forced to become the pope's vassal and pay him tribute. The nobles' actions were not considered extortion or blackmail, but rather a protection of individual rights.
Step-by-step explanation:
The Magna Carta was a document that the English nobles forced King John to sign in 1215, which codified the principles of due process and established the relationship between the king and the nobles in England.
It made it impossible for King John to do anything but sign the Magna Carta because he had been forced to become the pope's vassal and pay him tribute, and his vassals used this opportunity to compel him to reaffirm and expand the rights of commoners.
This was not considered extortion or blackmail because the nobles were asserting their rights and ensuring the protection of individuals from arbitrary actions by the king. As stated in the Magna Carta, 'no free man shall be seized or imprisoned, or stripped of his rights or possessions...except by the lawful judgment of his equals,' laying the foundation for trial by jury and due process.