where did these industries get started software, personal computer, internet, airline, car, etc.
Americans were the ones that created these industries and created new technologies, new needs, and new jobs. We are wealthier that other countries not just because of WWII, but because of innovation and our ability to create new industries that creates jobs and wealth.
IE, personal computers create so many jobs that no one would have thought would have existed 80 years ago.
Americans are the ones that are the forerunners of innovation. We've have created so much.