Have you read pg's essay "Cities and Ambition"? He explains there why there isn't a Silicon Valley outside of Silicon Valley. Different cities have different cultures, and encourage different things. The cities of Europe are ancient. Their ambitions were set long ago.
That said, there's much more to "entrepreneurship" than tech startups! Opening your own restaurant - not a chain franchise - is entrepreneurship, too. Or a barbershop, or making custom clothing, or running a small theater, or any number of other things. Small business is mostly small, not a stepping stone on the way to being huge.
In those terms, is the US actually doing better than Europe? Do entrepreneurs - not the millionaires, just the people who don't have to answer to anyone but themselves - do better here, or in Europe?
That said, there's much more to "entrepreneurship" than tech startups! Opening your own restaurant - not a chain franchise - is entrepreneurship, too. Or a barbershop, or making custom clothing, or running a small theater, or any number of other things. Small business is mostly small, not a stepping stone on the way to being huge.
In those terms, is the US actually doing better than Europe? Do entrepreneurs - not the millionaires, just the people who don't have to answer to anyone but themselves - do better here, or in Europe?