If you can find a copy of Against Civilization
, look through it. I remember reading some essays in it that defended hunter-gatherer quality of life.
Actually, let me go get it off the shelf and list the essays:
Arnold DeVries, Primitive Man and His Food
, 1952 (you have to scroll down a ways)
Marshall Sahlins, The Original Affluent Society
Marvin Harris, Life Without Chiefs
, 1989 (on social stability & equality/health of community)
Mark Nathan Cohen, Health and the Rise of Civilization
There is also the book "Wild Health" by Cindy Engel that shows just exactly how healthy one can keep oneself (if we learn from animals), when one has adequate access to nature's bounty, that is.
Also, for an indictment of the psychological ills of civilization, try My Name is Chellis and I'm in Recovery from Western Civilization
as well as this essay by Glenn Parton called The Machine in Our Heads