It's two of them, They were dependant on the USSR and They were neighboring states.
If you have to pick one, it's the first one I said.
The saying a hungry man is an angry man is really true. the whole point of doing what they did was basically to keep the masses mind occupied and to cancel any form or rebellion peacefully.
10th amendment:
“The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.”
Because of the good green grass that there is.
The purpose of dividing the government into 3 different branches was that so one entity did not have all the power. So they basically did it to divide the power.
