The family has a running joke that John will never be king or inherit any land. Oh, those hilarious royal jokes.
Who's laughing now? Aren't medieval mortality rates fun?
The Pope cites John's failure to play well with others and his refusal to accept the new Archbishop of Canterbury. It takes the king about four years to make friendsies with the Pope again.
He returns to England to deal with a mutinous rebellion against him among the English nobility. FYI: embarrassing an Englishman in front of the French is pretty much the #1 medieval no-no.
The peace treaty is meant to quell some of King John's most annoying traits, but instead he uses it to buy time before starting an all-out civil war with the barons.
King John claims that he was forced to agree to it and the Pope says that any barons who try to implement it will be excommunicated…because that's apparently the only punishment he knew about.
He probably thinks the whole Magna Carta thing is over forever, but it's really just getting started.
Much of the original Magna Carta is reused in the peace treaty.
King Henry III and King Edward I (John's son and grandson respectively) each use the Magna Carta to create new taxes during their reigns increasing its legitimacy.
This group of barons (mush like the one suggested in the Magna Carta) becomes England's first parliament.
The king can no longer do whatever he wants—exactly what the Magna Carta suggested.
The Magna Carta is brought out again as justification against the divine right of kings and to suggest alternative forms of government.
It borrows many ideas from the Magna Carta and unlike England's unwritten constitution it actually has physical form.