The idea that political authority ultimately rests in the hands of the people is known as

I believe the answer is: popular sovereignty

Popular sovereignty  refers to the principle which dictate that the highest authority within a country falls to the hand of the majority of the people. In democratic country, people could exercise this authority during the election when we could appoint the government representatives that aligned with our view.

what he said above me         look up that's the answer

answer; face validity;