Human nature being what it is, peace must inevitably be a relative condition. The essence of life is struggle and competition, and to that extent perfect peace is an almost meaningless abstraction. Struggle and competition are stimulating, but when they degenerate into conflict it is usually both destructive and disruptive. The aim of political institutions like the United Nations is to draw the line between struggle and conflict and to make it possible for nations to stay on the right side of that line.