The most likely reason why revolutions started in the nineteenth century in Europe was middle-class people believe that they are too poor.
Revolutions spread across Europe from the early 19th century throughout the years till the early 20th century and the main reason was because the economy was making the middle-class poor.
As is often the case, the middle class is the most influential class in an economy because they are a link between the upper and lower class and the lower class will often follow them as they did in nineteenth century Europe.
Find out more on Europe's Revolutions at https://brainly.com/question/815041
#SPJ1