The evolutionary process (the document began) is a phenomenon which has been of special and absorbing interest to me all my life, although in my own particular field I have been concerned only with one small, and perhaps unspectacular, aspect of it.  As a professor of history, I have been more and more intrigued, as the years go on, with the evolutionary trend of human thought.  I would be ashamed to enumerate how many times I've tried and how many hours I've spent in attempting to draw up a graph or chart or diagram, or whatever one might call it, to show the change and development in human thought through all historic ages.  The subject, however, is too vast and too diverse (and in some instances, I might as well confess, too contradictory) to lend itself to any illustrative scheme I've been able to devise.  And yet I am sure that human thought has been evolutionary, that the basis of it has shifted steadily through all of man's recorded time, that we do not think as we did a hundred years ago, that our opinions are much changed from a thousand years ago, not so much attributable to the fact that we now have better knowledge upon which to base our thinking, but that the human viewpoint has undergone a change - an evolution, if you please.

It may seem amusing that anyone should become so absorbed in the process of human thought.  But those who think it amusing would be wrong.  For it is the capability of abstract thought and nothing else which distinguishes the human being from any other creature that lives upon the earth.

Let us take a look at evolution, without attempting, or pretending to delve deeply into it, only touching a few of those more obvious landmarks which we are told by paleontologists highlight the path of progress from that primal ocean in which the first microscopic forms of life came into being at a very distant time.  Not hunting for, or concerning ourselves with all the subtle changes which marked development, but only noting some of the horizon lines which stand out as a result of all those subtle changes.

One of those first great landmarks must necessarily be the emergence of certain life forms from the water to live upon the land.  This ability to change environment undoubtedly was a much protracted and perhaps a painful and probably a hazardous procedure.  But to us today time telescopes it into a single event which stands out as a high point in the evolutionary scheme.  Another high point was the development of the notochord which, in millions of years to come, evolved into a backbone.  Yet another high point was the development of bipedal locomotion, although I, personally, am inclined to discount somewhat the significance of the erect position.  If one talks of man, it was not the ability to walk erect, but the ability to think beyond the moment and in other terms than the here and now that made him what he is today.

The evolutionary process represents a long chain of events.  Many evolutionary trends ran their courses and were discarded and many species became extinct because they were tied inexorably into some of those evolutionary trends.  But it was always from sonic factor, or perhaps from many factors which were involved in the development of those extinct life forms, that new evolutionary lines arose.  And the thought must occur to one that through all this tangled jungle of change and modification there must have run a single central core of evolution pointing toward some final form.  Through all the millions of years, that central evolutionary form, now expressed in man, lay in the slow growth of a brain which in time became a mind.