The End of Eternity (Signet SF, S1493)

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9780451014931: The End of Eternity (Signet SF, S1493)

One of Isaac Asimov’s SF masterpieces, this stand-alone novel is a monument of the flowering of SF in the twentieth century. It is widely regarded as Asimov’s single best SF novel.


Andrew Harlan is an Eternal, a member of the elite of the future. One of the few who live in Eternity, a location outside of place and time, Harlan’s job is to create carefully controlled and enacted Reality Changes. These Changes are small, exactingly calculated shifts in the course of history, made for the benefit of humankind. Though each Change has been made for the greater good, there are also always costs.


During one of his assignments, Harlan meets and falls in love with Noÿs Lambent, a woman who lives in real time and space. Then Harlan learns that Noÿs will cease to exist after the next Change, and he risks everything to sneak her into Eternity.

Unfortunately, they are caught. Harlan’s punishment? His next assignment: Kill the woman he loves before the paradox they have created results in the destruction of Eternity.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

About the Author :

Isaac Asimov lived in Boston and in New York City for most of his life.  He died in 1992 at the age of 72.

Excerpt. © Reprinted by permission. All rights reserved. :


Andrew Harlan stepped into the kettle. Its sides were perfectly round and it fit snugly inside a vertical shaft composed of widely spaced rods that shimmered into an unseeable haze six feet above Harlan’s head. Harlan set the controls and moved the smoothly working starting lever.

The kettle did not move.

Harlan did not expect it to. He expected no movement; neither up nor down, left nor right, forth nor back. Yet the spaces between the rods had melted into a gray blankness which was solid to the touch, though nonetheless immaterial for all that. And there was the little stir in his stomach, the faint (psychosomatic?) touch of dizziness, that told him that all the kettle contained, including himself, was rushing upwhen through Eternity.

He had boarded the kettle in the 575th Century, the base of operations assigned him two years earlier. At the time the 575th had been the farthest upwhen he had ever traveled. Now he was moving upwhen to the 2456th Century.

Under ordinary circumstances he might have felt a little lost at the prospect. His native Century was in the far downwhen, the 95th Century, to be exact. The 95th was a Century stiffly restrictive of atomic power, faintly rustic, fond of natural wood as a structural material, exporters of certain types of distilled potables to nearly everywhen and importers of clover seed. Although Harlan had not been in the 95th since he entered special training and became a Cub at the age of fifteen, there was always that feeling of loss when one moved outwhen from "home." At the 2456th he would be nearly two hundred forty millennia from his birth when and that is a sizable distance even for a hardened Eternal.

Under ordinary circumstances all this would be so.

But right now Harlan was in poor mood to think of anything but the fact that his documents were heavy in his pocket and tense, a little confused.

It was his hands acting by themselves that brought the kettle to the proper halt at the proper Century.

Strange that a Technician should feel tense or nervous about anything. What was it that Educator Yarrow had once said:

"Above all, a Technician must be dispassionate. The Reality Change he initiates may affect the lives of as many as fifty billion people. A million or more of these may be so drastically affected as to be considered new individuals. Under these conditions, an emotional make-up is a distinct handicap."

Harlan put the memory of his teacher’s dry voice out of his mind with an almost savage shake of his head. In those days he had never imagined that he himself would have the peculiar talent for that very position. But emotion had come upon him after all. Not for fifty billion people. What in Time did he care for fifty billion people? There was just one. One person.

He became aware that the kettle was stationary and with the merest pause to pull his thoughts together, put himself into the cold, impersonal frame of mind a Technician must have, he stepped out. The kettle he left, of course, was not the same as the one he had boarded, in the sense that it was not composed of the same atoms. He did not worry about that any more than any Eternal would. To concern oneself with the mystique of Time-travel, rather than with the simple fact of it, was the mark of the Cub and newcomer to Eternity.

He paused again at the infinitely thin curtain of non-Space and non-Time which separated him from Eternity in one way and from ordinary Time in another.

This would be a completely new section of Eternity for him. He knew about it in a rough way, of course, having checked upon it in the Temporal Handbook. Still, there was no substitute for actual appearance and he steeled himself for the initial shock of adjustment.

He adjusted the controls, a simple matter in passing into Eternity (and a very complicated one in passing into Time, a type of passage which was correspondingly less frequent). He stepped through the curtain and found himself squinting at the brilliance. Automatically he threw up his hand to shield his eyes.

Only one man faced him. At first Harlan could see him only blurrily.

The man said, "I am Sociologist Kantor Voy. I imagine you are Technician Harlan."

Harlan nodded and said, "Father Time! Isn’t this sort of ornamentation adjustable?"

Voy looked about and said tolerantly, "You mean the molecular films?"

"I certainly do," said Harlan. The Handbook had mentioned them, but had said nothing of such an insane riot of light reflection.

Harlan felt his annoyance to be quite reasonable. The 2456th Century was matter-oriented, as most Centuries were, so he had a right to expect a basic compatibility from the very beginning. It would have none of the utter confusion (for anyone born matter-oriented) of the energy vortices of the 300’s, or the field dynamics of the 600’s. In the 2456th, to the average Eternal’s comfort, matter was used for everything from walls to tacks.

To be sure, there was matter and matter. A member of an energy-oriented Century might not realize that. To him all matter might seem minor variations on the theme that was gross, heavy, and barbaric. To matter-oriented Harlan, however, there was wood, metal (subdivisions, heavy and light), plastic, silicates, concrete, leather, and so on.

But matter consisting entirely of mirrors!

That was his first impression of the 2456th. Every surface reflected and glinted light. Everywhere was the illusion of complete smoothness; the effect of a molecular film. And in the ever-repeated reflection of himself, of Sociologist Voy, of everything he could see, in scraps and wholes, in all angles, there was confusion. Garish confusion and nausea!

"I’m sorry," said Voy, "it’s the custom of the Century, and the Section assigned to it finds it good practice to adopt the customs where practical. You get used to it after a time."

Voy walked rapidly upon the moving feet of another Voy, upside down beneath the floor, who matched him stride for stride. He reached to move a hair-contact indicator down a spiral scale to point of origin.

The reflections died; extraneous light faded. Harlan felt his world settle.

"If you’ll come with me now," said Voy.

Harlan followed through empty corridors that, Harlan knew, must moments ago have been a riot of made light and reflection, up a ramp, through an anteroom, into an office.

In all the short journey no human being had been visible. Harlan was so used to that, took it so for granted, that he would have been surprised, almost shocked, if a glimpse of a human figure hurrying away had caught his eyes. No doubt the news had spread that a Technician was coming through. Even Voy kept his distance and when, accidentally, Harlan’s hand had brushed Voy’s sleeve, Voy shrank away with a visible start.

Harlan was faintly surprised at the touch of bitterness he felt at this. He had thought the shell he had grown about his soul was thicker, more efficiently insensitive than that. If he was wrong, if his shell had worn thinner, there could only be one reason for that.


Sociologist Kantor Voy leaned forward toward the Technician in what seemed a friendly enough fashion, but Harlan noted automatically that they were seated on opposite sides of the long axis of a fairly large table.

Voy said, "I am pleased to have a Technician of your reputation interest himself in our little problem here."

"Yes," said Harlan with the cold impersonality people would expect of him. "It has its points of interest." (Was he impersonal enough? Surely his real motives must be apparent, his guilt be spelled out in beads of sweat on his forehead.)

He removed from an inner pocket the foiled summary of the projected Reality Change. It was the very copy which had been sent to the Allwhen Council a month earlier. Through his relationship with Senior Computer Twissell (the Twissell, himself) Harlan had had little trouble in getting his hands on it.

Before unrolling the foil, letting it peel off onto the table top where it would be held by a soft paramagnetic field, Harlan paused a split moment.

The molecular film that covered the table was subdued but was not zero. The motion of his arm fixed his eye and for an instant the reflection of his own face seemed to stare somberly up at him from the tabletop. He was thirty-two, but he looked older. He needed no one to tell him that. It might be partly his long face and dark eyebrows over darker eyes that gave him the lowering expression and cold glare associated with the caricature of the Technician in the minds of all Eternals. It might be just his own realization that he was a Technician.

But then he flicked the foil out across the table and turned to the matter at hand.

"I am not a Sociologist, sir."

Voy smiled. "That sounds formidable. When one begins by expressing lack of competence in a given field, it usually implies that a flat opinion in that field will follow almost immediately."

"No," said Harlan, "not an opinion. Just a request. I wonder if you won’t look over this summary and see if you haven’t made a small mistake somewhere here."

Voy looked instantly grave. "I hope not," he said.

Harlan kept one arm across the back of his chair, the other in his lap. He must let neither hand drum restless fingers. He must not bite his lips. He must not show his feelings in any way.

Ever since the whole orientation of his life had so changed itself, he had been watching the summaries of projected Reality Changes as they passed through the grinding administrative gears of the Allwhen Council. As Senior Computer Twissell’s personally assigned Technician, he could arrange that by a slight bending of professional ethics. Particularly with Twissell’s attention caught ever more tightly in his own overwhelming project. (Harlan’s nostrils flared. He knew now a little of the nature of that project.)

Harlan had had no assurance that he would ever find what he was looking for in a reasonable time. When he had first glanced over projected Reality Change 2456-2781, Serial Number V-5, he was half inclined to believe his reasoning powers were warped by wishing. For a full day he had checked and rechecked equations and relationships in a rattling uncertainty, mixed with growing excitement and a bitter gratitude that he had been taught at least elementary psycho-mathematics.

Now Voy went over those same puncture patterns with a half-puzzled, half-worried eye.

He said, "It seems to me; I say, it seems to me that this is all perfectly in order."

Harlan said, "I refer you particularly to the matter of the courtship characteristics of the society of the current Reality of this Century. That’s sociology and your responsibility, I believe. It’s why I arranged to see you when I arrived, rather than someone else."

Voy was now frowning. He was still polite, but with an icy touch now. He said, "The Observers assigned to our Section are highly competent. I have every certainty that those assigned to this project have given accurate data. Have you evidence to the contrary?"

"Not at all, Sociologist Voy. I accept their data. It is the development of the data I question. Do you not have an alternate tensor-complex at this point, if the courtship data is taken properly into consideration?"

Voy stared, and then a look of relief washed over him visibly. "Of course, Technician, of course, but it resolves itself into an identity. There is a loop of small dimensions with no tributaries on either side. I hope you’ll forgive me for using picturesque language rather than precise mathematical expressions."

"I appreciate it," said Harlan dryly. "I am no more a Computer than a Sociologist."

"Very good, then. The alternate tensor-complex you refer to, or the forking of the road, as we might say, is non-significant. The forks join up again and it is a single road. There was not even any need to mention it in our recommendations."

"If you say so, sir, I will defer to your better judgment. However, there is still the matter of the M.N.C."

The Sociologist winced at the initials as Harlan knew he would. M.N.C.—Minimum Necessary Change. There the Technician was master. A Sociologist might consider himself above criticism by lesser beings in anything involving the mathematical analysis of the infinite possible Realities in Time, but in matters of M.N.C. the Technician stood supreme.

Mechanical computing would not do. The largest Computaplex ever built, manned by the cleverest and most experienced Senior Computer ever born, could do no better than to indicate the ranges in which the M.N.C. might be found. It was then the Technician, glancing over the data, who decided on an exact point within that range. A good Technician was rarely wrong. A top Technician was never wrong.

Harlan was never wrong.

"Now the M.N.C. recommended," said Harlan (he spoke coolly, evenly, pronouncing the Standard Intertemporal Language in precise syllables), "by your Section involves induction of an accident in space and the immediate death by fairly horrible means of a dozen or more men."

"Unavoidable," said Voy, shrugging.

"On the other hand," said Harlan, "I suggest that the M.N.C. can be reduced to the mere displacement of a container from one shelf to another. Here!" His long finger pointed. His white, well-cared-for index nail made the faintest mark along one set of perforations.

Voy considered matters with a painful but silent intensity.

Harlan said, "Doesn’t that alter the situation with regard to your unconsidered fork? Doesn’t it take advantage of the fork of lesser probability, changing it to a near-certainty, and does that not then lead to—"

"—to virtually the M.D.R." whispered Voy.

"To exactly the Maximum Desired Response," said Harlan.

Voy looked up, his dark face struggling somewhere between chagrin and anger. Harlan noted absently that there was a space between the man’s large upper incisors which gave him a rabbity look quite at odds with the restrained force of his words.

Voy said, "I suppose I will be hearing from the Allwhen Council?"

"I don’t think so. As far as I know, the Allwhen Council does not know of this. At least, the projected Reality Change was passed over to me without comment." He did not explain the word "passed," nor did Voy question it.

"You discovered this error, then?"


"And you did not report it to the Allwhen Council?"

"No, I did not."

Relief first, then a hardening of countenance. "Why not?"

"Very few people could have avoided this error. I felt I could correct it before damage was done. I have done so. Why go any further?"

"Well—thank you, Technician Harlan. You have been a friend. The Section’s error which, as you say, was practically unavoidable, would have looked unjustifiably bad in the record."

He went on after a moment’s pause. "Of course, in view of the alterations in personality to be induced by this Reality Change, the death of a few men as preliminary is of little importance."

Harlan thought, detachedly: He doesn’t sound really grateful. He probably resents it. If he stops to think, he’ll resent it ...

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