This is my favorite book at this point in my life (32 yrs)--have re-read it cover to cover 3 or 4 times. I feel as though I'm always learning, or being gracefully reminded of, something new when I move through the pages.
The writing, which indeed is an anthropological and physiological exploration of modern man and modern individualism, is insanely thoughtful and enriched. One can derive life altering insights to human behavior in every paragraph, seemingly....and although the subject matter will swing from the physical design of the eye, to primate behavior, to meditations of probable ancestral hunting lifestyles, the reader is never left with a disjointed impression of what he is trying to instill (which is self evident "us-knowledge").....Shepard ostensibly explores the ideas of his own mind, along with snipits of the (so called) anthropological record, in such a way as to say, "Hey, evaluate this stuff on your own, intelligent being."--as though playing an amanuensis for history and nature themselves.
Shepard is somewhat popularly catologued as a "futurist", though thats not the primary idea I'm left with in having read 4 of his books (in fact, I esteem this tag as being a slippery way of certain authorities in trying to distract one from his more meaningfull lessons). Essentially, this book is a lesson in Rhetoric (big R)--done poetically--and one that will appeal to anyone naturally curious about the big questions relating to human nature or natural history.
This book may also appeal to anyone sick of using a fiberglass compound bow, or anyone with slight to moderate anarchist inclinations.