The US also became the dominant superpower because of WW2, since much of the rest of the world powers suffered tremendous destruction - even those that won the

The US also became the dominant superpower because of WW2, since much of the rest of the world powers suffered tremendous destruction - even those that won the war. Also, most of the western world's gold was sent to the US (they didn't fight WW2 for free) which allowed the USD to become the world's dominant trade and reserve currency.