Generate text that refutes this claim: : Main purpose of UN, to prevent war, has clearly not been achieved.  The UN was set up with the express purpose of preventing global wars, yet it has done absolutely nothing to prevent them. Indeed, the UN has often served merely as a forum for countries to abuse and criticise each other, rather than resolve disputes peacefully.  In some cases, such as the 2003 invasion of Iraq, UN resolutions have arguably been used as a justification for wars, rather than to prevent them. Research shows that the number of armed conflicts in the world rose steadily in the years after 1945 and has only begun to plateau or fall since the end of the Cold War. [1]  [1] Harrison, Mark &amp; Wolf, Nikolaus. “The Frequency of Wars”. University of Warwick, 10th March 2011.
global house believes united nations has failed
It is unfair to say that the United Nations has failed just because conflict has not been eradicated from the world. The causes that drive nations to war with one another often cannot be resolved by diplomatic means; to set global peace as the test for the UN’s efficiency is clearly unfair. Nonetheless the UN has served as an effective forum for behind the scenes diplomacy in many international crises. It has come to the aid of countries when attacked, as in the examples of [South] Korea and Kuwait in 1950 and 1990 respectively; it has also kept the peace in, for example, the former Yugoslavia, Cyprus and East Timor. The fact that armed conflicts around the world have become less common since 1990 is, arguably, at least partly down to the good offices of the United Nations.