Answer:
abolitionists
those who believed slavery was bad for white workers
small farmers
Explanation:
1. Giving us the right to choose the government that represent our people.
2. Giving us the right to choose our jobs and not assigning us work we dont want.
3. They give us the freedom and fun of school. They let us learn for free about all the great topics of life like our history as humans. Also in science I learned about what I was made up of (figured out it was atoms).
The bubonic plaque changed the social structure of Europe by this:
Before, the nobles and aristocrats were the 'body' that ran almost everything political. However, after the bubonic plague, this was shifted towards the common people. So the common people basically got more rights.
hope this helps :D