Pinno718
Guru
To me, the interesting point is WHY did the USA gain ascendancy?
Vast resources and slavery. Geographically the US is reasonably isolated whilst Europe spent years waging war.*
The two World wars decimated Europe whereas the US stayed relatively intact and whilst we were rebuilding, the US were building - dams, highways and other infrastructure. WW2 spelled the end of the British Empire. The mass exodus of people after WW2 didn't really stop until well after the Hungarian revolution - an example of the upheaval caused by the war. The combined USSR lost 27m people (13.7%) of it's population. The US: only 0.32%.
*The 19th century in Europe was filled with significant conflicts, dominated early on by the Napoleonic Wars (1803–1815) and their aftermath, leading to numerous independence movements like the Greek War of Independence (1821–1832) and Polish Uprisings, followed by major unification wars for Italy and Germany, culminating in the Crimean War, Austro-Prussian War, and Franco-Prussian War, alongside ongoing struggles for empire and independence like the Russo-Turkish Wars.