The thesis seems understandable to me from the title, but I couldn’t tell you whether we should believe it or not. I assume the content of the book provides evidence and justification. I assume, because I haven’t read it either.
I assume the same. It's just that there is something nice about a theory that basically tells you the core of what you need to know from the name of it.
"We're making a new movie. It's called 'Snakes on a Plane' "
"Oh? What's it about?"
They did say that he had something there. AFAIK they didn't say that he spawned a whole field of research, though.