Telepathic Gorillas, and Lack of Doing

So, I'm reading "Ishmael" by Daniel Quinn. It's a good book and basically suggests adopting a paleolithic lifestyle. It's told as an interesting, somewhat warped, story taking place between a disgruntled man and an intelligent, telepathic gorilla. Worth a read.

And where does the author live? In Houston, Texas - in a city, living a neo-neolithic life.

Why don't people actually act upon their beliefs?