Aside from the obvious fact, that you cannot compare 500 million Europeans that speak plenty of different languages to 300 million US Americans (have you been t

Aside from the obvious fact, that you cannot compare 500 million Europeans that speak plenty of different languages to 300 million US Americans (have you been to Eastern Europe?), it is because the PC, the internet etc. were invented in the US, thus SV was formed and the start-ups there still reap the benefits (exit opportunities, investors, etc).