The paleo diet has opened up a whole new world for me. If the DIET is consistent with our genetic heritage, might other aspects of our modern lifestyle be out of sync with our genetic heritage? This has led me to numerous books about evolution, the ice age, etc. If you're interested, I would recommend Paul Shepard's "Coming Home to the Pleistocene." He thoughtfully suggests a lifestyle makeover (society wide) that he feels would put us in tune with our genetic roots.
I would also recommend James A. Swan's "In Defense of Hunting." The author, a Ph.D environmental psychologist, explains why we hunt and what value that has in our modern society. A great read.
I could go on, but basically the discovery of the paleo diet in 2002 has altered my world view quite a bit, and colors my judgement in all aspects of my life, from child-rearing to politics. Genetically, we ARE our paleolithic ancestors.