Question

Why did the major world powers fail to stop fascist aggression?

Answer 1

They wanted to avoid conflict, they didn't want to get themselves in another war. They also wanted Germany to act as a buffer between Europe and the Soviet Union. 

Answer 2

They wanted to avoid another conflict, and also wanted Germany to act as a buffer between Soviet Union and Europe.

Step-by-step explanation:

In the 1930's, the allies did not stop fascist aggression because the liberal progressives of the time underestimated the danger. They also wanted a stronger Germany to act as a regulator between the Soviet Union and the rest of Europe.