Communism and Fascism make playing the game much easier. You don't need an actual reason to declare war on people, you can send volunteers to fight in other people's wars right away, and less is required to change conscription laws and economies.    There's also the Kaiserreich mod, which portrays France, Britain, half of Italy, a third of India, and, possibly, the United States as being controlled by Anarcho-Syndicalists. The same mod also has Kaiser Wilhelm II still in power and the German Empire ruling a good portion of the world, but thankfully Kaiserboos are a tiny, insignificant minority.