Answer:
The United Nations.
Explanation:
The United Nations was born in 1945 just a few months after the end of World War Two, the most terrible and horrible of wars in mankind´s history. The UN was an American idea and it was created thanks to an active diplomatic engagement of the USA. In its Charter, it´s written that its goals are to preserve peace in the relations among nations and promote the peaceful solution of conflicts. 51 states were the founding members, with 5 great powers seating permanently in its Security Council.