Under what conditions could the Second World War be avoided?

In this situation, the war was no longer possible to avoid, but if it were like this:

1. If only another person came to power in Germany at that time. It’s about Hitler, his rise to power and ideology.

2. If the course of World War I and its results, the ambitions and interests of the parties would have been somewhat different. Including interests in Iran and the Balkans.

3. If the USSR itself was not guilty of this war. The USSR, bypassing international treaties, quietly supported Germany. These were the supply of food, raw materials, the provision of airfields for training German pilots on their aircraft. Germany had no right to have military aircraft then.

4. If Japan did not conduct an aggressive policy in its region.