United Nations was formed to bring peace and avoid war. It was hoped that world would not encounter any other major war. Efforts were made to ensure the implementation of Uno agenda. There are a few achivements of United Nations. However, the major conflicts of world are still pending to be resolved. If we talk about human rights, it will be realized that many people are suffering because of discriminatery policies of Uno for developed and developed countries. Had ther been active role of UNO, America would have not dared to invade Iraq. Moreover, after Arab spring, middle east trapped into a quagmie. Iraq, syria and yamen have lost their glory. People of these three countries are dying but UNO has failed to solve this issue. Moreover if we talk about right of self determination, we will realize that how palestinians,kurds and kashmiris are deprived of this right of theirs. Moreover, our world has seen many issues eg Rawanda genocide, serbian crisis, afghanistan war, vietnam war etc. Moreover, Rohingia crisis is another issue that shows how UNO has failed to bring peace in the world.