Whatever problems the future might bring, time did not yet hang heavy on humanity’s hands. Education was now much more thorough and much more protracted. Few people left college before twenty — and that was merely the first stage, since they normally returned again at twenty-five for at least three more years, after travel and experience had broadened their minds. Even then, they would probably take refresher courses at intervals for the remainder of their lives in the subjects that particularly interested them.

This extension of human apprenticeship so far past the beginning of physical maturity had given rise to many social changes. Some of these had been necessary for generations, but earlier periods had refused to face the challenge — or had pretended that it did not exist. In particular, the pattern of sexual mores — insofar as there had ever been a single pattern — had altered radically. It had been virtually shattered by two inventions, which were, ironically enough, of purely human origin and owed nothing to the Overlords. The first was a completely reliable oral contraceptive; the second was an equally infallible method — as certain as fingerprinting, and based on a very detailed analysis of the blood — of identifying the father of any child. The effect of these two inventions upon human society could only be described as devastating, and they had swept away the last remnants of the Puritan aberration.

Another great change was the extreme mobility of the new society. Thanks to the perfection of air-transport, everyone was free to go anywhere at a moment’s notice. There was more room in the skies than there had ever been on the roads, and the, twenty-first century had repeated, on a larger scale, the great American achievement of putting a nation on wheels. It had given wings to the world.

Though not literally. The ordinary private flyer or air-car had no wings at all, or indeed any visible control surfaces. Even the clumsy rotor blades of the old helicopters had been banished. Yet Man had not discovered anti-gravity; only the Overlords possessed that ultimate secret. His air-cars were propelled by forces which the Wright brothers would have understood. Jet reaction, used both directly and in the more subtle form of boundary layer control, drove his flyers forward and held them in the air. As no laws or edicts of the Overlords could have done, the ubiquitous little air-cars had washed away the last barriers between the different tribes of mankind.

Profounder things had also passed. It was a completely secular age. Of the faiths that had existed before the coming of the Overlords, only a form of purified Buddhism — perhaps the most austere of all religions — still survived. The creeds that had been based upon miracles and revelations had collapsed utterly. With the rise of education, they had already been slowly dissolving, but for a while the Overlords had taken no sides in the matter. Though Karellen was often asked to express his views on religion, all that he would say was that a man’s beliefs were his own affair, so long as they did not interfere with the liberty of others.

Perhaps the old faiths would have lingered for generations yet, had it not been for human curiosity. It was known that the Overlords had access to the past, and more than once historians had appealed to Karellen to settle some ancient contro- versy. It may have been that he had grown tired of such questions, but it is more likely that he knew perfectly well what the outcome of his generosity would be….

The instrument he handed over on permanent loan to the World History Foundation was nothing more than a television receiver with an elaborate set of controls for determining coordinates in time and space. It must have been linked somehow to a far more complex machine, operating on principles that no one could imagine, aboard Karellen’s ship. One had merely to adjust the controls, and a window into the past was opened up. Almost the whole of human history for the past five thousand years became accessible in an instant. Earlier than that the machine would not go, and there were baffling blanks all down the ages. They might have had some natural cause, or they might be due to deliberate censorship by the Overlords.

Though it had always been obvious to any rational mind that all the world’s religious writings could not be true, the shock was nevertheless profound. Here was a revelation which no one could doubt or deny: here, seen by some unknown magic of Overlord science, were the true beginnings of all the world’s great faiths. Most of them were noble and inspiring — but that was not enough. Within a few days, all mankind’s multitudinous messiahs had lost their divinity. Beneath the fierce and passionless light of truth, faiths that had sustained millions for twice a thousand years vanished like morning dew. All the good and all the evil they had wrought were swept suddenly into the past, and could touch the minds of men no more.

Humanity had lost its ancient gods; now it was old enough to have no need for new ones.

Though few realized it as yet, the fall of religion had been paralleled by a decline in science. There were plenty of technologists, but few original workers extending the frontiers of human knowledge. Curiosity remained, and the leisure to indulge in it, but the heart had been taken out of fundamental scientific research. It seemed futile to spend a lifetime searching for secrets that the Overlords had probably uncovered ages before.