

makes it more likely that an armed conflict will occur, even if none of the countries involved intend to commence hostilities. In other words, countries acting on their own to increase security, build up their armed forces, provide assistance to allies, etc.

It was recognized that allowing "little wars" to rage without acting to resolve differences would nearly always destabilize neighboring countries, and eventually draw them into the conflict through a process known as the spiral model. Primarily the lesson of WWI, the formation of the League of Nations and later the United Nations was conceived as a legitimate way to intervene to prevent regional rivalries and disagreements from becoming hostilities.

US foreign policy since WWII has been driven by two overriding concepts, basically the two most important "lessons" of the years 1914-1945 if you will:
