Nazis believed the driving force in history was race
"C. was overthrown by invading Mongol tribes in A.D. 1279" would be the best phrase describing China's Song Dynasty, but this was of course not always the case.
Answer:
They opposed it because isolationist sentiment was growing, and many people feared American involvement in another war.
Explanation:
The people did not want another World War and one was already enough. Sadly enough there was World War 2 in Franklin Delano Roosevelts term.
If I remember this right, it was the French.
Answer:
Before things like mountains were typically boundaries since they were a pain in the butt to cross. But with modern planes, and depending on the mountian, cars, mountains aren't as big a pain anymore. Deserts might have also been a boundary before. Today you turn on the AC and drive straight across it. At least for technologically advanced western countries, there really isn't any geographic feature we can't easily get around.
