alright.... take away the US for a 2nd..... Hitler and the nazi party take over europe, then move on to asia. pretty soon the world is over run with death camps. the rest is left to our imagination.
technology would be 10 years behind what it is now (at least). the US was teh biggest out exportuing country until the discovery of oil in the mioddle east, so that would be gone.
lots of medical research wouldn't have taken place.
Granted, without manye countries, some things wouldn't have happened, but hell, you cannot for one second think the US is a bunch of good for nothing arrogant sons of bitches... with out the US, the would would have drumbled a long long time ago.