JaggyShortBuff:
There are many superb athletes from other countries that would turn pro in the US in a minute. The IFBB Pro League clearly favors US bodybuilders. You should pay attention to some of the "amateur" bodybuilders in Brazil, Venezuela, Qatar, Egypt, Slovakia, Russia, Hungary, etc.
They don't get any coverage in Muscle&Fitness or Flex Magazine, but many of them put the winners of the NPC Nationals or USA's to shame.