What was the main purpose of the United Nations when it was created after WWII? 1to compensate nations that rejected Communism
2to prevent wars by facilitating cooperation between countries
3to limit the production of nuclear weapons
4to prosecute and punish World War II war criminals

I believe the main reason why the U.N. was created was to prevent wars by facilitating cooperation between countries.

Explanation:

The United Nations, formerly known as the League of Nations, was established in the 20th century. According to the official website, the U.N's four primary goals are the following: "To keep peace throughout the world;  to develop friendly relations among nations;  to help nations work together to improve the lives of poor people, to conquer hunger, disease and illiteracy, and to encourage respect for each other’s rights and freedoms;  to be a center for harmonizing the actions of nations to achieve these goals." Hope this helps; have a great day!

the answer would be a i think?