Page xii: Chapter 19 is missing a period
Page 151: gauge
The degree of closed-mindedness is not necessarily an accurate guage of how much one knows and understands!
Page 155: villains
Both saints and villians are found in the pages of history. The former are credited with leading us in the ways of virtue, while the latter lead us toward evil.
Page 171: Neanderthals (?) UNCHANGED
I believe that man, millennia hence, is intended to excel us in this respect precisely as men of our time are markedly ahead of Neanderthalers.