K
Obviously you can't see beyond the tip of your nose...
Things that wouldn't exist without the US:
Modern bodybuilding as an industry.
Nuclear technology.
Global pop culture (closely followed by the UK as we know it).
Multi ethnic sports, culture and leadership.
The Information Age (From IBM, MSFT, TANDEM, SUN, CISCO and now GOOGLE and beyond).
... and soon cheap renewable energy.
The list is endless...