CatLover:I claim the United States having emerged without it's infrastructure having been demolished by the war made it the only purveyor of quality manufactured goods in the world.
Also, the United States dollar was the reserve currency for the industrialized world after the war.
First, it was far from an "unprecedented boom." It was exactly like every other false boom.
US prosperity was not due to it being the sole industrial power, it was due to the priveleges it got from being the printer of the world's reserve currency. Of course, the US printed too much of it and eventually owed more debt than it owned gold. Eventually other nations becaming net exporting countries and were in a position to cash in that debt for American gold, at that point the game was up and Nixon had to severe the dollar from gold.