- The Ultimate Resource by Julian Simon  --the human mind has limitless potential to select and pursue the use of materials; and
- Capitalism by George Reisman  -- the phenomenon of price responds to actual supply and demand, and prompts profit-seekers to develop and switch production accordingly.
 http://www.amazon.com/dp/B0084RU67S, see Part One, Chapter 3
I think it's pointless to argue about it in that way, though. If you can think of a supposed example (or more than one) of a monopoly that doesn't derive from government power, I'll either explain to you why that's not the case, or concede the point. I scanned at the list of examples on Wikipedia briefly, and didn't find any "free market monopolies."
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