This earth is one of the rare spots in the cosmos where mind has flowered. Man is a product of nearly three billion years of evolution, in whose person the evolutionary process has at last become conscious of itself and its possibilities. Whether he likes it or not, he is responsible for the whole further evolution of our planet.

We are the highest achievement reached so far by the great constructors of evolution. We are their "latest" but certainly not their last word. The scientist must not regard anything as absolute, not even the laws of pure reason. He must remain aware of the great fact, discovered by Heraclitus, that nothing whatever really remains the same even for one moment, but that everything is perpetually changing. To regard man, the most ephemeral and rapidly evolving of all species, as the final and unsurpassable achievement of creation, especially at his present-day particularly dangerous and disagreeable stage of development, is certainly the most arrogant and dangerous of all untenable doctrines. If I thought of man as the final image of God, I should not know what to think of God. But when I consider that our ancestors, at a time fairly recent in relation to the earth's history, were perfectly ordinary apes, closely related to chimpanzees, I see a glimmer of hope. It does not require very great optimism to assume that from us human beings something better and higher may evolve. Far from seeing in man the irrevocable and unsurpassable image of God, I assert – more modestly and, I believe, in greater awe of the Creation and its infinite possibilities – that the long-sought missing link between animals and the really humane being is ourselves!

Only within the moment of time represented by the present century has one species — man — acquired significant power to alter the nature of the world.

man's evolution was unique in showing the dominance of convergence over divergence:

Only within the moment of time represented by the present century has one species — man — acquired significant power to alter the nature of his world.

"Upon the whole, humanity changes little. What has been shall be." "No doubt," replied'Jean Boilly, " man, or that which we call man, changes little. We belong to a definite species. The evolution of the species is of necessity included in the definition of the species. It is impossible to conceive humanity subsequent to its transformation. A transformed species is a lost species. But what reason is there for us to believe that man is the end of the evolution of life upon the earth? Why suppose that his birth has exhausted the creative forces of nature, and that the universal mother of the flora and fauna should, after having shaped him, become for ever barren. A natural philosopher, who does not stand in fear of his own ideas, H. G. Wells, has said : 'Man is not final.' No indeed, man is neither the beginning nor the end of terrestrial life. Long before him, all over the globe, animated forces were multiplying in the depths of the sea, in the mud of the strand, in the forests, lakes, prairies, and tree-topped mountains. After him, new forms will go on taking shape. A future race, born perhaps of our own, but having perchance no bond of origin with us, will succeed us in the empire of the planet. These new spirits of the earth will ignore or despise us. The monuments of our arts, should they discover vestiges of them, will have no meaning for them. Rulers of the future, whose mind we can no more divine than the palaeopithekos of the Siwalik Mountains was able to forecast the trains of thought of Aristotle, Newton, and Poincaré."

Humanity is not the last rung of the terrestrial creation. Evolution continues and man will be surpassed. It is for each individual to know whether he wants to participate in the advent of this new species.

As geological time goes, it is but a moment since the human race began and only the twinkling of an eye since the arts of civilization were first invented. In spite of some alarmists, it is hardly likely that our species will completely exterminate itself. And so long as man continues to exist, we may be pretty sure that, whatever he may suffer for a time, and whatever brightness may be eclipsed, he will emerge sooner or later, perhaps strengthened and reinvigorated by a period of mental sleep. The universe is vast and men are but tiny specks on an insignificant planet. But the more we realize our minuteness and our impotence in the face of cosmic forces, the more astonishing becomes what human beings have achieved.

Man emerged as the dominant type on earth about a million years ago, but has only been really effective as a psychosocial organism for under ten thousand years. In that mere second of cosmic time, he has produced astonishing achievements — but has also been guilty of unprecedented horrors and follies. And looked at in the long perspective of evolution he is singularly imperfect, still incapable of carrying out his planetary responsibilities in a satisfactory manner...

Mankind has never been in this position before. Without having improved appreciably in virtue or enjoying wiser guidance, it has got into its hands for the first time the tools by which it can unfailingly accomplish its own extermination. That is the point in human destinies to which all the glories and toils of men have at last led them. They would do well to pause and ponder upon their new responsibilities...Surely if a sense of self-preservation still exists among men, if the will to live resides not merely in individuals or nations but in humanity as a whole, the prevention of the supreme catastrophe ought to be the paramount object of all endeavour.

Man had dominated the Earth by virtue of a single assumption: that an effect could be traced to a cause, itself the effect of a previous cause. Manipulation of this basic law yielded rich results; there seemed no need for any other tool or instrumentality. Man congratulated himself on his generalized structure. He could live on desert, on plain or ice, in forest or in city; Nature had not shaped him to a special environment. He was unaware of his vulnerability. Logic was the special environment; the brain was the special tool.

The sole purpose of man on earth is to manifest his Creator. He has no other purpose.

Man is a creature whose evolutionary environment has been the open air. His nerves, muscles, and senses have developed across three million years in contiguity with natural earth, crude stone, live wood, wind, and rain. Now this creature is suddenly--on the geologic scale, instantaneously--shifted to an unnatural environment of metal and glass, plastic and plywood, to which his psychic substrata lack all compatibility. The wonder is not that we have so much mental instability but so little.

Three and a half million years separate the individual who left these footprints in the sands of Africa from the one who left them on the moon. A mere blink in the eye of evolution. Using his burgeoning intelligence, this most successful of all mammals has exploited the environment to produce food for an ever-increasing population. In spite of disasters when civilisations have over-reached themselves, that process has continued, indeed accelerated, even today. Now mankind is looking for food, not just on this planet but on others. Perhaps the time has now come to put that process into reverse. Instead of controlling the environment for the benefit of the population, perhaps it's time we control the population to allow the survival of the environment.