Answer:-
The League of Nations:-
By December, he was able to negotiate the inclusion of the League of Nations in the Treaty of Versailles. It was the first example of an international organization working its clout and reconciling two distressed nations. While the League of Nations was profoundly ineffective, it did lay the groundwork for a future international body. The UN and all the good it's done would not exist today without this precursor.The war changed the economical balance of the world, leaving European countries deep in debt and making the U.S. the leading industrial power and creditor in the world. Inflation shot up in most countries and the German economy was highly affected by having to pay for reparations.