I am puzzled by the inconsistency of quality of this book. I read the kindle version, and the first think that strikes is the poor punctuation. Missing full stops, and obviously he cannot see the difference between a dash and a hyphen, which is unsettling. Then there are many poor analogies with American popular culture, most of which I didn't get. On the other hande, there is interesting data, and many conclusions that make a lot of sense. Also the analogies between language evolution and biological evolution are very relevant and appropriate.