Mandamus, with a wordless cry, bent over him.
Giskard said, "Dr. Mandamus, Dr. Amadiro is not dead. He is at the moment in a coma from which he can be roused at any time. However, he will have forgotten everything in connection with this present project, nor will he ever be able to understand anything in connection with it - if, for instance, you tried to explain it. In the process of doing this - which I could not have done without his own admission that he intended today's large numbers of Earthmen - I may have permanently damaged other parts of his memory and his thinking processes. That I regret, but I could not help it."
Daneel said, "You see, Dr. Mandamus, some time ago, on Solaria, we encountered robots who narrowly defined human beings as Solarians, only. We recognize the fact that if different robots are subject to narrow definitions of one sort or another, there can only be measureless destruction. It is useless, to try to have us define human beings as Aurorans only. We define human beings as all members of the species Homo sapiens, which includes Earthpeople and Settlers, and we feel that the prevention of harm to human beings in groups and to humanity as a whole comes before the prevention of harm to any specific individual."
Mandamus said breathlessly, "That is not what the First Law says."
"It is what I call the Zeroth Law and it takes precedence."
"You have not been programmed in such a way."
"It is how I have programmed myself. And since I have known from the moment of our arrival here that your presence is intended for harm, you cannot order me away or keep me from harming you. The Zeroth Law takes precedence and I must save Earth. Therefore, I ask you to join me - voluntarily - in destroying these devices you have here. Otherwise, I will be forced to threaten harm to you, as Dr. Amadiro did, although I would not use a blaster."
But Mandamus said, "Wait! Wait! Hear me out. Let me explain. That Dr. Amadiro has had his mind wiped clean is a good thing. He wanted to destroy Earth, but I did not want to. That was why he held a blaster on me."
Daneel said, "It was you, however, who originated the notion, who designed and built these devices. Otherwise, Dr. Amadiro would not have had to try to force you to do anything. He would have done it himself and would not have required any help from you. Isn't that right?"
"Yes, that is right. Giskard can examine my emotions and see if I'm lying. I built these devices and I was prepared to use them, but not in the fashion Dr. Amadiro wished. Am I telling the truth?"
Daneel looked at Giskard, who said, "As nearly as I can tell, he is telling the truth."
"Of course I am," said Mandamus. "What I am doing is to introduce a very gradual acceleration of the natural radioactivity in the Earth's crust. There will be one hundred and fifty years during which the people of Earth can move to other worlds. It will increase the population of the present Settler worlds and increase the Settlement of worlds in great numbers. It will remove Earth as a huge anomalous world that forever threatens the Spacers and stultifies the Settlers. It will remove a center of mystical fervor that is holding back the Settlers. Am I telling the truth?"
Again Giskard said, "As nearly as I can tell, he is telling the truth."
"My plan, if it works out, would preserve the peace and make the Galaxy a home for Spacer and Settler alike. That is why, when I constructed this device - "
He gestured toward it, placing his left thumb on the contact, and then, lunging toward the volume control shouted, "Freeze!"
Daneel moved toward him and stopped, frozen, right hand upraised. Giskard did not move.
Mandamus turned back, panting, "It's at 2.72. It's done. It's irreversible. Now it will be played out exactly as I intended. Nor can you bear witness against me, for you will start a war and your Zeroth Law forbids that."
He looked down at the prone body of Amadiro and said, with a cold look of contempt, "Fool! You will never know how it should have been done."
19. ALONE
100
Mandamus said, "You cannot harm me now, robots, for nothing you do to me will alter the fate of the Earth."
"Nevertheless," said Giskard shakily, "you must not remember what you have done. You must not explain the future to the Spacers." He reached for a chair and, with a trembling hand, pulled it toward himself and sat down, as Mandamus crumpled and, slid down into what seemed to be a gentle sleep.
"At the last," said Daneel in soft despair, as he looked down at the two unconscious bodies, "I failed. When it was necessary for me to seize Dr. Mandamus to prevent harm to people who were not present before my eyes, I found myself forced to follow his order and froze. The Zeroth Law did not work."
Giskard said, "No, friend Daneel, you did not fail. I prevented you. Dr. Mandamus had the urge to try to do what he did and was held back by the fear of what you would certainly do if he did try. I neutralized his fear and then I neutralized you. So Dr. Mandamus set the Earth's crust on fire, so to speak - on very slow fire."
Daneel said, "But why, friend Giskard, why?"
"Because he was telling the truth. I told you so. He thought he was lying. From the nature of the triumph in his mind, I am under the firm impression he felt that the consequence of the growing radioactivity would be anarchy and confusion among Earthpeople and Settlers and that the Spacers would destroy them and seize the Galaxy. But I thought the scenario he presented us to win us over was the correct one. The removal of Earth as a large crowded world would remove a mystique I have already felt to be dangerous and would help the Settlers. They will streak outward into the Galaxy at a pace that will double and redouble and without Earth to look back to always, without Earth to set up a god of the past - they will establish a Galactic Empire. It was necessary for us to make that possible." He paused and, his voice weakening, he said, "Robots and Empire."