I was able to get the book online and read the relevant material. The book is about the technological future. The bit about crashes is a side issue, which explains why he mentions a Crash of 1850. There was no crash of 1850. His point is big crashes occur as a result of technologically advancement, but they have never derailed progress. He is right on his main point. It's not an economics book at all. So there would be no reason to go into details. If you are interested in this topic Harry Dent's stuff is a good place to start. It's written for the general audience, easy to follow, and quite illuminating. It's what originally turned me on to S&H and other cycles.
I'll also mention that he and I are on the same page as expecting a deflationary market crash.
I'll also mention that he and I are on the same page as expecting a deflationary market crash.