Illustrated by GAUGHAN

[Transcriber's Note: This etext was produced from

Galaxy Science Fiction December 1956.

Extensive research did not uncover any evidence that

the U.S. copyright on this publication was renewed.]

Changing the world is simple; the trick is

to do it before you have a chance to undo it!

It was a good job and Max Alben knew whom he had to thank for it--his

great-grandfather.

"Good old Giovanni Albeni," he muttered as he hurried into the

laboratory slightly ahead of the escorting technicians, all of them,

despite the excitement of the moment, remembering to bob their heads

deferentially at the half-dozen full-fleshed and hard-faced men

lolling on the couches that had been set up around the time machine.

He shrugged rapidly out of his rags, as he had been instructed in the

anteroom, and stepped into the housing of the enormous mechanism.

This was the first time he had seen it, since he had been taught

how to operate it on a dummy model, and now he stared at the great

transparent coils and the susurrating energy bubble with much respect.

This machine, the pride and the hope of 2089, was something almost

outside his powers of comprehension. But Max Alben knew how to run it,

and he knew, roughly, what it was supposed to accomplish. He knew also

that this was the first backward journey of any great duration and,

being scientifically unpredictable, might well be the death of him.

"Good old Giovanni Albeni," he muttered again affectionately.

If his great-grandfather had not volunteered for the earliest

time-travel experiments way back in the nineteen-seventies, back even

before the Blight, it would never have been discovered that he and his

seed possessed a great deal of immunity to extra-temporal blackout.

And if that had not been discovered, the ruling powers of Earth, more

than a century later, would never have plucked Max Alben out of an

obscure civil-service job as a relief guard at the North American

Chicken Reservation to his present heroic and remunerative eminence.

He would still be patrolling the barbed wire that surrounded the three

white leghorn hens and two roosters--about one-sixth of the known

livestock wealth of the Western Hemisphere--thoroughly content with

the half-pail of dried apricots he received each and every payday.

No, if his great-grandfather had not demonstrated long ago his unique

capacity for remaining conscious during time travel, Max Alben would

not now be shifting from foot to foot in a physics laboratory,

facing the black market kings of the world and awaiting their final

instructions with an uncertain and submissive grin.

* * * * *

Men like O'Hara, who controlled mushrooms, Levney, the blackberry

tycoon, Sorgasso, the packaged-worm monopolist--would black marketeers

of their tremendous stature so much as waste a glance on someone like

Alben ordinarily, let alone confer a lifetime pension on his wife and

five children of a full spoonful each of non-synthetic sugar a day?

Even if he didn't come back, his family was provided for like almost no

other family on Earth. This was a damn good job and he was lucky.

Alben noticed that Abd Sadha had risen from the straight chair at

the far side of the room and was approaching him with a sealed metal

cylinder in one hand.

"We've decided to add a further precaution at the last moment," the old

man said. "That is, the scientists have suggested it and I have--er--I

have given my approval."

The last remark was added with a slight questioning note as the

Secretary-General of the United Nations looked back rapidly at the

black market princes on the couches behind him. Since they stared back

stonily, but offered no objection, he coughed in relief and returned to

Alben.

"I am sure, young man, that I don't have to go into the details of your

instructions once more. You enter the time machine and go back the

duration for which it has been preset, a hundred and thirteen years, to

the moment after the Guided Missile of 1976 was launched. It _is_ 1976,

isn't it?" he asked, suddenly uncertain.

"Yes, sir," one of the technicians standing by the time machine said

respectfully. "The experiment with an atomic warhead guided missile

that resulted in the Blight was conducted on this site on April 18,

1976." He glanced proudly at the unemotional men on the couches, very

much like a small boy after completing a recitation before visiting

dignitaries from the Board of Education.

"Just so." Abd Sadha nodded. "April 18, 1976. And on this site. You

see, young man, you will materialize at the very moment and on the

very spot where the remote-control station handling the missile

was--er--handling the missile. You will be in a superb position, a

superb position, to deflect the missile in its downward course and

alter human history for the better. Very much for the better. Yes."

He paused, having evidently stumbled out of his thought sequence.

"And he pulls the red switch toward him," Gomez, the dandelion-root

magnate, reminded him sharply, impatiently.

"Ah, yes, the red switch. He pulls the little red switch toward him.

Thank you, Mr. Gomez, thank you very much, sir. He pulls the little

red switch on the green instrument panel toward him, thus preventing

the error that caused the missile to explode in the Brazilian jungle

and causing it, instead, to explode somewhere in the mid-Pacific, as

originally planned."

The Secretary-General of the United Nations beamed. "Thus preventing

the Blight, making it nonexistent, as it were, producing a present-day

world in which the Blight never occurred. That is correct, is it not,

gentlemen?" he asked, turning anxiously again.

* * * * *

None of the half-dozen men on couches deigned to answer him. And

Alben kept his eyes deferentially in their direction, too, as he had

throughout this period of last-minute instruction.

He knew who ruled his world--these stolid, well-fed men in clean

garments with a minimum of patches, and where patches occurred, at

least they were the color of the surrounding cloth.

Sadha might be Secretary-General of the United Nations, but that

was still a civil-service job, only a few social notches higher

than a chicken guard. His clothes were fully as ragged, fully as

multi-colored, as those that Alben had stepped out of. And the gnawing

in his stomach was no doubt almost as great.

"You understand, do you not, young man, that if anything goes wrong,"

Abd Sadha asked, his head nodding tremulously and anticipating the

answer, "if anything unexpected, unprepared-for, occurs, you are not to

continue with the experiment but return immediately?"

"He understands everything he has to understand," Gomez told him.

"Let's get this thing moving."

The old man smiled again. "Yes. Of course, Mr. Gomez." He came up to

where Alben stood in the entrance of the time machine and handed the

sealed metal cylinder to him. "This is the precaution the scientists

have just added. When you arrive at your destination, just before

materializing, you will release it into the surrounding temporal

medium. Our purpose here, as you no doubt--"

Levney sat up on his couch and snapped his fingers peremptorily. "I

just heard Gomez tell you to get this thing moving, Sadha. And it isn't

moving. We're busy men. We've wasted enough time."

"I was just trying to explain a crucial final fact," the

Secretary-General apologized. "A fact which may be highly--"

"You've explained enough facts." Levney turned to the man inside the

time machine. "Hey, fella. You. _Move!_"

Max Alben gulped and nodded violently. He darted to the rear of the

machine and turned the dial which activated it.

_flick!_

* * * * *

It was a good job and Mac Albin knew whom he had to thank for it--his

great-grandfather.

"Good old Giovanni Albeni," he laughed as he looked at the morose faces

of his two colleagues. Bob Skeat and Hugo Honek had done as much as he

to build the tiny time machine in the secret lab under the helicopter

garage, and they were fully as eager to go, but--unfortunately for

them--they were not descended from the right ancestor.

Leisurely, he unzipped the richly embroidered garment that, as the

father of two children, he was privileged to wear, and wriggled into

the housing of the complex little mechanism. This was hardly the

first time he had seen it, since he'd been helping to build the device

from the moment Honek had nodded and risen from the drafting board,

and now he barely wasted a glance on the thumb-size translucent coils

growing out of the almost microscopic energy bubbles which powered them.

This machine was the last hope, of 2089, even if the world of 2089, as

a whole, did not know of its existence and would try to prevent its

being put into operation. But it meant a lot more to Mac Albin than

merely saving a world. It meant an adventurous mission with the risk of

death.

"Good old Giovanni Albeni," he laughed again happily.

If his great-grandfather had not volunteered for the earliest

time-travel experiments way back in the nineteen-seventies, back even

before the Epidemic, it would never have been discovered that he and

his seed possessed a great deal of immunity to extra-temporal blackout.

And if that had not been discovered, the Albins would not have become

physicists upon the passage of the United Nations law that everyone

on Earth--absolutely without exception--had to choose a branch of

research science in which to specialize. In the flabby, careful,

life-guarding world the Earth had become, Mac Albin would never have

been reluctantly selected by his two co-workers as the one to carry the

forbidden banner of dangerous experiment.

No, if his great-grandfather had not demonstrated long ago his unique

capacity for remaining conscious during time travel, Mac Albin would

probably be a biologist today like almost everyone else on Earth,

laboriously working out dreary gene problems instead of embarking on

the greatest adventure Man had known to date.

Even if he didn't come back, he had at last found a socially useful

escape from genetic responsibility to humanity in general and his own

family in particular. This was a damn good job and he was lucky.

"Wait a minute, Mac," Skeat said and crossed to the other side of the

narrow laboratory.

* * * * *

Albin and Honek watched him stuff several sheets of paper into a small

metal box which he closed without locking.

"You will take care of yourself, won't you, Mac?" Hugo Honek pleaded.

"Any time you feel like taking an unnecessary risk, remember that Bob

and I will have to stand trial if you don't come back. We might be

sentenced to complete loss of professional status and spend the rest of

our lives supervising robot factories."

"Oh, it won't be that bad," Albin reassured him absent-mindedly from

where he lay contorted inside the time machine. He watched Skeat coming

toward him with the box.

Honek shrugged his shoulders. "It might be a lot worse than even that

and you know it. The disappearance of a two-time father is going to

leave an awful big vacancy in the world. One-timers, like Bob and

me, are all over the place; if either of us dropped out of sight, it

wouldn't cause nearly as much uproar."

"But Bob and you both tried to operate the machine," Albin reminded

him. "And you blacked out after a fifteen-second temporal displacement.

So I'm the only chance, the only way to stop the human race from

dwindling and dwindling till it hits absolute zero, like that fat old

Security Council seems willing for it to do."

"Take it easy, Mac," Bob Skeat said as he handed the metal box to

Albin. "The Security Council is just trying to solve the problem in

their way, the conservative way: a worldwide concentration on genetics

research coupled with the maximum preservation of existing human lives,

especially those that have a high reproductive potential. We three

disagree with them; we've been skulking down here nights to solve it

_our_ way, and ours is a radical approach and plenty risky. That's

the reason for the metal box--trying to cover one more explosive

possibility."

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