I believe the most important level of government is the state government. I believe the state government is the most important because the state government provides needs for our state. The state government provides schools, water, fire department, police department, etc. The state government arranges elections, to see who the next president will be. Without the state government we wouldn't have a police department or a fire department to keep us safe. Those are reasons why the state government is the most important (idk if it actually is).
The League of Nations was formed to unify many countries. It wasn't very efficient. The United Nations was essentially an improved version of the League of Nations.