He only has one book as the reference for all the “history,” which makes me doubt most of it.  Certainly, the claim that everybody (except Aztecs and Incas) was “peacable” (sic) is nonsense.  The Apache tribes often raided each other (<a href="http://en.wikipedia.org/wiki/Apache_indians" rel="nofollow">http://en.wikipedia.org/wiki/Apache_indians</a>), and the legendary Apache fighting skills were certainly not a result of living peacefully for centuries before the Europeans arrived.