And allow citizens of russia freely travel to America, and allow citizens of America freely travel to Russia. I found that your communism idea though makes some sense is completely unsupported by game lore and facts. Chinese were communists, doesnt initially make Enclave against communism. You might forget that the war started, or better said, the roots of the war were because of fuel crisis. Resources were scarce and China more when anyone needed them. America was also in the need of supplies and Russia had their own huge resources, but maybe in the time of 2077 not huge but enough not to go into war.
This is true that the main cause of the great war and the conflict between the United States and China was indeed the fighting over resources. However given that during the real 1950s America went through what was known as the "Red Scare," it makes sense to suggest that the American government of the Fallout Universe (and thus the Enclave) was steadfastly against communism (and this can be seen in many posters and of course liberty prime in Fallout 3). You're right in saying that this dislike of communism was not the main cause of the war and I hope that wasn't what my post implied, but this battle between democracy and communism was certainly a major factor in it.
I don't think that the Enclave's actual mission statement, or if it even had one at all, has even been mentioned. I always assumed that the Enclave was less an actual seperate organisation and more of a code-word or something.
yeah I would agree that the Enclave never really offically stated what their mission was, but I believed it was implied through the propaganda of President Eden and President Richardson. The pre-war "Enclave" (the American government: like you said, before the war the Enclave was the American government, there was no distinction between the two) had the main goal of defeating China and ending something that they believed to be the root cause of the problems (Communism). Later however, with the Great War, the Enclave's goals were focused on restablishing control over the continental united states, as the battle with China (and thus communism) had been voided.