What class made up the working class of people in Rome? What upset this group of people and led to civil wars in Rome?

A thing that made up the working class of people in Rome upset and led to civil wars in Rome is described below in brief details.

Explanation:

The political and all other important position in the government was controlled by the powerful and wealthy families which upset the working class because they are lacking with the basic opportunities. The backbone of the empire was the peasants but they were powerless to contend with the wealthy landowners. The aristocrats employed slave labor.  

b. 20: 5

explanation:

20% of the worlds population lives in southwest asia, and less than 5% of the world's

land area.