1

The local ruler is putting up exorbitant taxes in order to create a massive statue of himself

2

The bastard son of the local baron is riling them up to retake the throne

3

Tax collectors are assholes

4

Someone's sister committed suicide and now people who besmirched her honor enough for her to fall into sorrow must die

5

The people want democratic rule for themselves

6

Occupying forces of a nearby liege lord aren't nice to the people in whose homes they are quartered

7

The nobles are decadent and degenerate

8

The nobles refuse to partake in any orgies or cult sacrifices what awful prudes

9

The local priests of the church call for a spiritual ascension

10

Smugglers are tired of having to avoid local officials and seek to plunge the area in chaos to smuggle their goods

11

Those aren't peasants they are foreign military forces in disguise

12

Those aren't peasants they are illusions conjured by a vile wizard

13

Those aren't peasants they are actually nobles in disguise trying to see how the lesser folk live

14

Wandering nobles have begun cutting down peasants in order to test out new swords

15

Rich merchants refuse to pay weregilds

16

Some asshole wizard ruined all the local Feng Shui

17

Usury keeps many in poverty

18

Some merchants have built a dam on the local river drying out all of the farmland

19

A foul omen rises in the sky invoking the end of days

20

New laws passed restricting the colors the peasants can wear

21

New laws passed restricting the colors the peasants can look at

22

New laws passed taxing reasonable things (land)

23

New laws passed taxing unreasonable things (salt)

24

New laws passed taxing incredibly unreasonable things (usage of sunlight by a man's plants)

25

New laws passed cutting the beards off of men

26

It hasn't rained in 3 months

27

It has kept raining for 3 months

28

It's a local tradition for the peasants to revolt. If the ruler cannot stop it they lose the mandate of heaven

29

Famine ravages the land leaving many hungry

30

Another noble is financing the rebellion so his rival can lose face in the royal court

31

Bandits want to take over and rule the region and happen to be loved by the populace

32

All the booze is gone and no-one can figure out how

33

A local town elder has been lynched on rather flimsy circumstances

34

A massive tragedy was actually fake and a wide conspiracy was kept to make people believe in it

35

Repeating dreams that all of the peasants share tell them to revolt

36

A massive bet between the peasants has gotten incredibly out of hand

37

The pope has sent in copious amounts of church militants to ensure no one fornicates or even masturbates

38

Ghosts of the deceased count beg them to kill his son so that he cannot plunge the county into despair

39

War looms and the army has begun forcibly conscripting people into service

40

The local nobility is secretly a monster

41

A noble was killed by a small boy with a rock and now nobles have begun rounding up all the rocks because they are too powerful for the common man

42

A local pie-maker is refusing to make anymore pies because his daughter's fiance chose the pies over rescuing his daughter from local bandits. Everyone loves his pies

43

Many men have returned from war and now are bored

44

Traveling Outlanders have done something terrible and are now hiding from the consequences of their actions

45

Two local sports heroes have been sentenced to prison and now their fans are joing forces to riot

46

A local tournament has been announced to see who is the strongest in the land and the first round is a massive free for all

47

The local lawman is trying to make it illegal to make sweet love your cousin

48

A wandering man spontaneously exploded and mass hysteria grips the people

49

There is no rebellion. This is merely a ruse for people to request money and supplies

50

A result of poor-breeding