What Caused the Second World War? Who Was to Blame?

Britain and France on Germany declared war, September 1939. World War II lasted for six years killing millions; injuring and traumatizing many more. Two decades earlier, World War I had taken place also killing, injuring and traumatizing millions. How was it that even with the creation of the Treaty of Versailles aiming to limit Germany's power and prevent another war; twenty years later Europe was once again plunged into chaos.
Adolf Hitler and the Nazi party with their aggressive policies and actions, in my opinion, are to blame for the war. However, many others are responsible for allow…