Answer:
Step-by-step explanation:
 The world was changing because it was preceded by the Industrial Revolution.
These are the factors that led to World war 2 changing:
The Failure of Peace 
The Rise of Fascism. .
Formation of the Axis Coalition. 
German Aggression in Europe. 
The Worldwide Great Depression. 
Japan invading of China (1937) 
Pearl Harbor and Simultaneous Invasions