> Also adjusted for purchasing power, they exceed $50,000 in Mississippi, America’s poorest state—higher than in France. Damn...how does a country get so rich?
Well, being the only country left with any manufacturing after a catastrophic world war is one major reason. Also, navigable waterways. Transporting goods by water costs 1/100th what it costs to transport over land. After the US established a corp of engineers to dredge our waterways to make them passable, the ability to transport goods increased substantially, making internal trade extremely cheap.
This is not the reason. Post WW II Europe was able to rebuild and for a long time they had some of the biggest companies and for a long time EU as a whole was a bigger economy than the US. It's only in the last 2 decades where the US is significantly outpacing the EU. And there are no signs of slow down.
WW II can not be the reason EU has few big tech companies. (relatively compared to the US, few exceptions always exist)