What is the name of the philosopher that made the social contract

Who founded the social contract theory of the government

Describe the social and economic problems that existed during the coolidge administration, and explain why president coolidge did not address them

Ineed an answer asap. which is not a reason for the “era of good feeling”? a) economy in the us was booming. b) the united states was victorious in the war of 1812. c) the united states outlawed slavery. d) the federalist party was disbanded and the united states had one political party.