The United States emerged as a leading world power after world war I due to the treaty of Versailles. This is my best answer. I hope this helps! :)
I think it’s false but I’m not 100% sure
I want to say entrepreneurship, but there's also free economy enterprise, so... I'm gonna go with entrepreneurship.
In a general sense, World War I and World War II were wars conducted on a massive scale unlike any other wars in history. They were similarly caused by nationalism, imperialism, alliances, and militarism. Both wars saw countries trying to upset the power balance in Europe for their own gain.