America didn't "save the world" in WWII - they saved themselves along with everybody else.
Uhh..yeah. We only spent $13 billion USD to help rebuild post-war Europe through something called the Marshall Plan.
To be fair, the Russians did put up one helluva good fight against the Nazis. Major losses at Stalingrad.
But, to say the US was somehow just 'in it for ourselves' is just bullshit. We very reluctantly got involved in the first place.