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The role played by UNO to maintain international peace and security are:1. Solving social,cultural,humanitarian and economic problems through international cooperation.
2. The promotion of human rights and fundamental freedom for people all over the world.
3. Save future generations from the devastation of wars.
4. To establish equal rights for all persons.
5. To promote justice, freedom, and social progress for the people of all its member states.
6. To respect international laws and treaties.