Comparing and Contrasting Europe after the World War I and II?

I have to put together a final essay and have to compare and contrast Europe's peace after both WWI and WWII. Peace was an odd word for my professor to use, but I'm uming he wants us to mention the Versailles Treaty, but also the rise to Fascism and Nazism, and policy of Appeasement. Could anyone come up with a few ideas for putting this together?