The United Nations was established at the end of World War II on the basis of the aspiration of the peoples for the world peace and the cooperation among the allied nations during the war. By that time, however, among the rulers of Britain and the U. S. the anti-soviet sentiment had appeared, which thereafter underlined the cold war policy of these nations.
From historical point of view, the practices of the United Nations may be devided into two periods; the first from 1945 to 1955, the second from 1956 to the present.
The significance of the United Nations in the international events or problems in which this organization was involved in the respective period, seems to be evaluated in three ways; positive, reluctant and negative.
The first period was characterized by the supremacy of the West in and out of the United Nations. In this period the United Nations fulfiled the positive role chiefly in the following fields, (1) promotion of peaceful settlement of international hostilities and disputes in maintaining harmony among the Big Five Powers, as seen in cases of Parestine and Indonesia questions, (2) awakening public opinions about the world peace or anti-colonialism by means of discussing problems concerning colonialism, inter-state conflicts or disarmament, (3) contribution to developing international intercources and fostering international cooperation. But the United Nations in the same period was reluctant in dealing with problems of colonialism and disarmament, was marked by the negative attitudes toward other problems such as admitting new members or terminating the Korean War.
The role of the United Nations entering into the second period changed remarkably. On the one hand, the positive aspects of the United Nations' activities greatly enlarged, on the other, the United Nations, especially since 1960, began to wrestle very actively with the problems of anti-colonialism and disarmament. Why these changes were caused? These changes seem to be explained by the fact that the balance of forces in the cold war has been developing favorably toward socialist and non-aligned countries, and the supremacy of the West has been disappeared as the result of entering of many Afro-Asian countries into the U. N. Now it seems to be possible for the U. N. to become a true center of international cooperation by fulfiling the more active role in the fields of disarmament and anti-colonialism and thus deterring the development of the cold war. And also this organization has been gaining the universal character with its members from all over the world. However, the U. N. confronts many tasks to be solved, among which most urgent are China's participation and reasonable reforms of the organization.
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