When King John signed the Magna Carta, otherwise known as The Great Charter, it said that he couldn't take away rights from anybody. But the didn't include the commoners at first, it eventually included the commoners.
That meant that nobles and monarchs had less power, which caused the commoners to have more power. This eventually destroyed the feudal system.
We have will get rights!
In the late fifteenth century, a disease called the Bubonic plague, or black death, started to invade Europe. The disease was spread by rats carrying it on trade ships from Asia.
Fun Fact: Did you know a third of the population died from the plague?
Hey, so I can demand rights and better working conditions because so many people died!
Then from between 1337 to 1453 C.E there was a war between England and France know as "The One Hundred Years War". It lasted so long that the king just decided that he would get commoners to fight. That meant that Nobles were no longer important cause they did not need to supply knights and the nights were not needed.