The question your asking is asking for your opinoin so you can put what you want
The League of Nations failed for many reasons. One of them being the fact that the United States didn't join. The American people didn't support the League this caused them not to join. The United States if very important in establishing a global power. You would also need China and Russia to join. They did but it doesn't work without all three,
Monarchy
Anarchy (Not sure if thats actually political so ill add one more)
Communism
Dictatoship
No...(if your talking about Charles Darwin..lol) The only he did was create a new theory of how things were created..God's still here