They all studied the social contract.
Answer:
Confucianism, Daoism, and Legalism.
Explanation:
I think that it is the Atlantic but let me know if this is incorrect...
First amendment freedom of speech and religion, 4th the right to be secure in their persons houses papers and documents, and 19th gave women the right to vote
The purpose of dividing the government into 3 different branches was that so one entity did not have all the power. So they basically did it to divide the power.