Consume Product

the US made its wealth from its industries and tariffs on imports. whatever came afterwards, ie: high taxes, didnt make it more prosperous, when it already was prosperous.

That coupled with the US being the only major economic country that wasnt destroyed during WW2 meant all the other european nations were downgraded because of it, the US was comparatively wealthier. If that war didnt happen Europe would have been as prosperous. Or if US as a country and its industries were destroyed during the entire length of the WW2 timeframe, it would have been less prosperous, and on the level of Europe post WW2.