Science (best universities, most Nobel laureates, Harvard, etc.).
Silicon Valley (Apple, Facebook, Google, Intel, Microsoft, Amazon, etc.)
Wall Street (JPMorgan Chase, Citigroup, Bank of America, Goldman Sachs, Standard & Poor's, Moody's, Fitch, Bridgewater, Blackrock, NYSE, NASDAQ, etc.)
Entertainment industry / Hollywood (Walt Disney, Sky, CNN, MTV, etc.)
Pharma (Pfizer, Amgen, Merck, etc.)
Also intermix everywhere, lead to war, sanctions against other countries and hurt you do not come in the same pot.
Manches can not do the AMIS at all
Cooking food, build good cars, play football: -)
Much more homeless than us, much more prisoners, more murders, much more energy waste and pollution. And a high degree of unpopularity in the world.
This is historical. The US had a leading role in the world wars. Many clever people have spilled into the US.
Operation Overcast (Operation PaperClip)
The Overcast operation wasA military secret project in the US to recruit German scientists and technicians after the defeat of Nazi Germany at the end of World War II and to secure their military military and knowledge. Wikipedia
Technology always builds on with improvements.