Post war boom had the European and Japanese economy offline, and Chinese economy nonexistent. So no globalization threat. It is very unrealistic to compare to it or expect that condition again (unless we are talking about 100% tariffs coming back)
Even the UK, in the seventies often referred to as "sick man of Europe", had built an unprecedented period of growth, falling inequality, and extreme exporting. The immediate post-war saw "export or die" as the political catchphrase.
The marked difference is, unlike the US who had profited hugely from WW2, those economies started from near bankruptcy in 1945 so took a little longer to reach boom.
Could we reproduce similar conditions? No. Could we have an economy that benefits a far wider proportion of citizens and makes it feel like a boom or expansion for them? Most certainly.
https://en.wikipedia.org/wiki/Post-World_War_II_economic_exp...