Main Causes of WWII

There were a couple of causes of World War II but they all seem to have to do with Germany and Italy. All the other countries had such a tough time and needed time to build up their forces again. They did not bother doing anything about what Germany and Italy were doing. Italy had not exactly gained or lost much in WWI, and Germany had lost a great amount but after Hitler came into power, he decided to break the rules of the Treaty of Versailles. Italy invaded Ethiopia in 1933 and Mussilini slowly strengthened his empire. Hitler on the other hand step by step broke the rules and built a stronger military force. He also made a smart move of signing the non-agression pact with Stalin.  During all these events, none of the other countries stopped Hitler in any way.