I think the reason for Silicon Valley being in the USA and their entrepeneurial approach is that the USA as a country of immigrants has got higher concentration of people with ADD. ADD people from Europe migrated into the USA since people with ADD are more likely to migrate.

Those people are responsible for the culture of impulsivness and creativity in the USA, kinda like role models. So migration is responsible for the lack of this kind of entrepeneurial approaches in Europe and responsible for the surplus of the same in the USA.

Simple, he? What do you think about this theory?