What were the two main compromises of the constitutional convention and how did they affect the government

The two main compromises were the Great Compromise and the 3/5 Compromise. 

The Great Compromise created a bicameral legislature. It created the House of Representatives, in which the representation of the states depended on their population, and the Senate, in which each state had an equal number of representatives.

The 3/5 Compromise stated that slaves would be counted as 3/5 of a person.

from the conditions of the working class in england by friedrich engels,the main idea is :

manchester's leaders hoped to oppress its working class to benefit factory owners.