The 4 main purposes of the United Nations

"The UN has 4 main purposes :

• 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 centre for harmonizing the actions of nations to achieve these goals."

More on http://www.un.org/en/aboutun/index.shtml