How did the Progressive Era and the New Deal fundamentally impact the relationship between capitalism and democracy?

First one is: How did the Progressive Era and the New Deal fundamentally impact the relationship between capitalism and democracy?

Second one is: Was America’s involvement in World War I necessary to victory? Yes or no?  

Then, I want you to write 2 pages for each topic. Moreover, I hope you use your own words to finish these papers, but you still can do some research.

Cheers!