One that actually changed the system in a meaningful way (lowered taxes, prevented mistreatment, increased peasants' rights and freedom)?
After googling a bit for the answer, I came across a few examples, but none of them qualify in my book:
– Wat Tyler's rebellion – it didn't actually accomplish anything (except for stopping further increase of the taxes) and I actually don't see why it's considered such a big deal in the first place. The episode with the king was interesting, but, in the end, things stayed pretty much the same.
– The Kaga rebellion – it doesn't really count, because the participants were from different classes (including some nobility).
– Uprising of Ivaylo – it definitely was a success and, therefore, comes close to what I was searching for, but not completely, because it looks to me more like one person's rise to power than a violent social change that benefited the peasant class. Besides, Ivaylo's reign ended after a year, when he was killed.
– Some people also mentioned the events that lead to the foundation of the Old Swiss Confederacy, but I don't think it counts neither, because those events involved different classes and I don't see where a peasant revolt comes into play.
Does anyone here know a better example or, perhaps, can prove why the examples above actually count as successful peasant revolts?
Source: reddit post