The Magna Carta was the first document of rights of the English people. The Magna Carta established that the King should follow the law and could no longer reign as he pleased. It was one of the first documents to grant citizens rights. In this way, it is considered a type of constitution. The Magna Carta was the first step in the drafting of the constitution of England.
The English nobles, Church leaders and people did not like King John. He exploited his people. The barons drafted the Magna Carta to limit the king's power, and John did not have the strength to oppose them.