文档介绍：To my children, in whom I see myself reborn and, thanks to their mother, perceptibly im-
proved.
In the preparation of the present or earlier versions of this book, the writer has had the gen-
erous counsel of:
Wayne Bailey, Lt. Gen., USAF, Ret.
Raymond B. Cattell, ., .
Frank L. Girard, .
Marta Everton, .
Samuel J. Holmes, .
John Horn, .
Hermann J. Muller, ., .
Maurice W. Nugent, .
Garrett Hardin, .
The willingness of these exceptionally able people to render advice should not be taken to
mean that they agree with all of the author's ideas.
Author's Intentions
The purpose of this book— a streamlined and updated version of a fully documented work
published in 1970— is to describe, as accurately as the available facts permit, where man
e from, why he e so far, and what major influences are now at work upon
him. Its further purpose is to propose ways of altering and modifying some of the adverse in-
fluences so man may realize much more of his tremendous potential and move ahead to new
heights of human creativity and well-being.
—Robert Klark Graham
I
FROM HUNTED TO HUNTER
The tree-dwelling ancestors of man were among the most intelligent beings of their distant
age.
When these creatures finally abandoned the trees and walked fully upright, freeing their
hands to serve as implements of their minds as well as their bodies, there began the most
essful evolutionary drive toward higher intelligence ever witnessed in Nature.
As ground dwellers, these creatures were easy victims of the great predators, who hunted
them down by day and surprised them at night as they huddled in clearings or in caves. They
could pete in strength, ferocity or speed with their attackers. Armed with little except
their hands and what plex brains enabled them to do with their hands, they had to
think or die. For untold thousands of years most of them met early, violent deaths. Only a few
in each generation had