In the Roman Republic, there were two classes - patricians and plebeians. Patricians had full authority, which plebeians didn't accepted. They fought for their rights, and gained them. That is why Roman Republic transformed in total.
Explanation:
Patricians were wealthy landowners who were bringing all major decisions. Plebeians who were mostly poor wanted some type of representative in the government. They retreated from the city, thus making patricians to accept some of their requests. Among the other things, they could vote, enter the Senate, even take the role of consuls.
About the 9th and 10th Amendments. AMENDMENT IX to the Constitution of the United States: The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.
