Answer:
Step-by-step explanation:
Transfer some of the power (not all -- not yet) from the monarchy to the those with titles -- dukes earls knights and princes. Not so much princes. It was to give some of the say to those actually paying most of the taxes. The barons of the time demanded that the King not be above the law.
The magna carta had one clause that has since been in every constitution. It America, it is the 6th amendment. One accused of a crime is guaranteed a speedy trial.