Popular sovereignty
In which the people choose who will represent them in the government.
Hope this helps :)
Answer:
When the "North Korea invaded South Korea, this marked the beginning of the Korean War.
Explanation:
I believe it is existentialism but I'm not sure. It could also be nihilism or objectivism depending on which philosopher, time period and context of your question. But I'm like 98% sure it's existentialism.
Explanation:
In the turmoil surrounding the unpopular Vietnam War, lowering the national voting age became a controversial topic. Responding to arguments that those old enough to be drafted for military service, should be able to exercise the right to vote, Congress lowered the voting age as part of the Voting Rights Act of 1970.