Offtopic, but while multiculturalism makes certain things difficult (like congress in the US now, agreeing on policy) diversity also helps in other ways (like being able to understand and deal with those who aren't like you and don't agree with you). One example of an extremely sucessful, multicultural society is Singapore. And, be honest, for all of America's faults, it's still a world power and one of the largest economies in the world.