A life-long preoccupation with the past as geologist, paleontologist, archeologist, or interdisciplinary evolutionist inevitably leads to a heightened sense of time and a realization of the changes that are possible on this planet throughout the ages. No one who has pondered those consequences of time and change can doubt that evolution has occurred or that it is still taking place. A special excitement overcomes students of the past whenever new discoveries make them aware of evolutionary process and pattern. The slow rush of evolution is awesome. It is difficult, perhaps even dangerous, for an individual to be attunded to this natural process all the time. For this reason, the society of scientists recognizes certain spokesmen who represent its thoughts on evolution. Their writings are read, or put aside for the moment, in step with one's ability to confront fact and accept it. In the pages that follow, Professor H. James Birx speaks to us. Human Evolution presents an unique perspective on topics of evolution by an author who is an educator, scientist, and humanist. This study is indispensable to researchers and students who seek a history of evolutionary science and desire to find their place within this fast-paced, developing field.