The Crusades have ended and many people are going to towns to sell the loot they earned.
The common people gained power because they were needed so much that eventually they were in charge.
You want to go sell our stuff for big money in the towns?
Glad the crusades are over...
Then the French claimed lands that were owned by the English and both sides started fighting.
Wow! There are so many job opportunities here! Those feudal manors must be deserted..
King John in england was forced to sign the Magna Carta, which gave normal people more power.
You're Going to have to sign this
Blah blah blah
But... But... this will end all powerful kings and feudalism. Now the normal people will have power!
Sire, we have lost so many people to the plague and we have a labor shortage
We are going to start having to pay the common people sadly.
This is ours! Fine then, I'm going to War!!!
No, it ours!
Finally, a peasant girl, named Joan of Arc, who claimed she head the word of god, won a ton of battles for the French, all of this lead to the decline of feudalism and the increase in power for the common people