Anybody who considers "the world" to extend beyond the borders of the United States might consider the possibility that a couple of billion non-Americans probably wanted to be saved from the prospect of Hitler having so much control over the whole of Europe he was in a position to start extending the Final Solution to the "untermenschen" of half the former British Empire whilst his allies in the East continued to rape and pillaged their way across the other half. But yeah, the Bay Area would probably have been untouched.