For the last few centuries, the United States economy has been dependent upon a few different things. One of those is innovation, for without it, no growth would be possible. One of the things that has always pushed the American system forward is a spirit that promoted and demanded innovation at the same time.
People used their creative juices to create things that would benefit society and from there, we have grown to a point where new innovations are almost elementary. The abstract definition of innovation has to do with simply taking what we currently have and improving it to better benefit society. There are quite a few examples of this where gifted individuals have taken steps to empowering an entire industry.