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.

Land Grant College Act is the jewel of Republican reform. It had not occurred to any other country to educate their farmers and workers. When the British studied the reasons for American success in 1851, the consensus was that Americans workers were well educated. So they didn't oppose progress the way British workers did.

Military power tends to be a function of economic power, and the British Navy was the essential capability for establishing the imperial sway - which was attuned to furnish the raw materials for the British manufacturing ascendance. So they were mutually reinforcing.

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 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.

We were suddenly getting big, with burgeoning capabilities on all sides, but very clumsy, knew we were on some kind of ride, and things changing fast, but with very little idea of what was going on.