The evolution was always to greater scale and speed. Other countries did that here and there - GB in textiles, Germany in steel - but we went in that direction almost across the board.

Whitney proved to be a competent manufacturer, but wasn't an original inventor to any important degree. Thomas Blanchard was a true genius: his stock making machine was the daddy of all the industrial profiling machinery, like the 1870s universal milling machine, that was the especial American contribution to machining technology. By that time, the British conceded that machinery innovation had shifted to America.

The drive to scale in almost every endeavor. The British went very large scale in ship building and a few other industries. Their steel plants were bigger and much more advanced than ours after the Civil War, but we had blown past them by the mid-80s.

merica was middle-class for the very start - the people who came first were hyper-strivers from England. There were no vested interests, no ranks, no classes, it was very lightly populated, there were unlimited natural resources - for free essentially - if you failed, you could always start over.

After I finished the Tycoons - on post-Civil War development - I realized how much I didn't know about the first half of the century, even though there had obviously been an enormous amount of development, so I read about and thought about that for a couple of years before I decided I was ready for a book.

The Transcontinental Railroad Act is the first step in creating a continental common market.

I would speculate that a critical mass of the population has to internalize a middle class outlook first. International aid experience has demonstrated many times that just building railroads doesn't get you there. You need people ready to sue them.