Infectious diseases and colonization.
Sorry, I don't have an answer more specifc than that.
Answer:
A social contract is an agreement between people in a society to cooperate for social benefits, such as giving up their freedoms for protection. So the answer would be "A social contract is based on the belief that people must be willing to give up some of their freedoms to maintain order"
Explanation:
I think the answer for your question is 961,121.
There are to many such as the romans didnt believe in puritanship so they just didnt follow ordership
Answer: The telegraph made communication much easier, the railroad made transportation of goods and people quicker and easier. The sewing machine made life on the plains easier.