Well, you are right. Edison and others like him had a knack for taking an idea and making it into something that people want and capitalizing on it. This of course did wind up providing a lot of jobs and opportunities and helped this country to grow in leaps and bounds. In order to provide added skill for further innovation a whole generation of young people were spurred into the technologies, the sciences, engineering, finance, management, and other important fields and opened new avenues of interest and spawned new technologies. It also helped to grow a strong and robust middle class , particularly during the post war years.
Then came Ronnie...