The State Department and other existing organizations have been used effectively for many years in negotiations and other non-military relations with other nations.

This bill is a load of gas designed to impress people for whom "peace" is a "worship word" resistant to any further definition. It's also, if you look through the bill, a method for funneling huge piles of tax money to favored leftist causes.

Additionally, I don't see how piling existing functions into one huge bureaucracy is going to be end up being any more effective than it was when the Department of Homeland Security was created.