Roman confederation gave the people more rights and allowed them to have their culture.
Step-by-step explanation:
Roman confederation and the eventual empire that became from it had one very different purpose fro the others in that it did not differentiate with the new citizens of the country who had come in by conquest.
Instead all they had to do was pay taxes and recognize themselves as roman citizen.
They could keep speaking their language and worshiping their religion as well as have abilities to control and garner wealth in certain alliances too making it good to be a roman citizen for them.