You will get a few different answers if you ask a liberal this. normally they just say its b/c america is so rich b/c we exploited the rest of the world via the industrial revolution. We had these things before everyone else so we "exploited them". The other common answer is american intervention kept all the socialist countries from becoming utopia's. if america didn't intervene then it wasn't real socialistm. i've had this conversation multiple times the mental gymnastics they will do is actually hilarious.