Around 1200 in Medival England most things had to do with a term called "Feudalism". At the bottom of the system is where the peasants belonged, the peasants farmed land that they had rented from the barons. The barons were the wealthier people because they helped out the king at times. The king was on top of the system because he ruled everything, he could do everything he wanted including making people pay tax. The king was supported by the Pope and the Archbishop of Canterbury.
It all started when Henry Plantagenet, to be the king of England owned a very big empire. He was inherited some of France, but he wanted to have to the province of Aquitaine which Queen Elenor owned. Henry decided to marry her so he could own the land, his domain grew massively, he had eight children with Elenor. William, Henry, Matilda, Richard, Geoffery, Eleanor, Joan and his youngest son John. John the youngest son knew that he was never going to become king. But everything changed when William, Henry, and Geoffery died. When Henry the second died, Richard became king, he barely spent and anytime in England. He was off fighting in the crusades, or fighting rebels in France. In 1199 while Richard was trying to take over a castle in Shadow he got wounded and he died. John was crowned king of England, he got inherited a lot of worries. Pressure from the barons and other kings. He failed to protect and expand his father's empire, he never listened to the barons demands. On 1216 King John got washed up with all his treasures after having a rampage with the barons in his own land, he even lost the crown of England in the sea. Then John's son, Henry became King. The country was still a mess, he had to be crowned with a plain gold ring after his father lost the crown of England. So William Marshall, Henry the Third's main advisor helped him create the Magna Carta. As time kept flying by William Marshall would redevelop the Magna Carta, he even made it part of the peace treaty to end the civil war. If any king had a problem they would reissue the Magna Carta and get it approved by the parliament. The Magna Carta was helping step by step to create a fair society for everyone, this was the core of our legal system. One-quarter of the people in the world live in a country where their system was inspired by the Magna Carta.