Page 1187 - Enders_Game_Full_Book

"But we should have the Little Doctor here!"
"The Little Doctor shouldn't exist at all," said Peter. "It was never necessary. It was never appropriate. Because the cost of it is too high."
"Cost!" hooted Quara. "It's cheaper than the old nuclear weapons!"
"It's taken us three thousand years to get over the destruction of the hive queens' home planet. That's the cost. If we use the Little Doctor, then we're the sort of people who wipe out other
species. Admiral Lands was just like the men who were using Ender Wiggin. Their minds were made up. This was the danger. This was the evil. This had to be destroyed. They thought they meant well. They were saving the human race. But they weren't. There were a lot of different motives involved, but along with deciding to use the weapon, they also decided not to attempt to communicate with the enemy. Where was the demonstration of the Little Doctor on a nearby moon? Where was Lands's attempt to verify that the situation on Lusitania had not changed? And you, Quara-- what methodology, exactly, were you planning to use to determine whether the descoladores were too evil to be allowed to live? At what point do you know they are an unbearable danger to all other sentient species?"
"Turn it around, Peter," said Quara. "At what point do you know they're not?"
"We have better weapons than the Little Doctor. Ela once designed a molecule to block the descolada's efforts to cause harm, without destroying its ability to help the flora and fauna of Lusitania to pass through their transformations. Who's to say that we can't do the same thing for every nasty little plague they send at us until they give up? Who's to say that they aren't already trying desperately to communicate with us? How do you know that the molecule they sent wasn't an attempt to make us happy with them the only way they knew how, by sending us a molecule that would take away our anger? How do you know they aren't already quivering in terror down on that planet because we have a ship that can disappear and reappear anywhere else? Are we trying to talk to them?"
Peter looked around at all of them.
"Don't you understand, any of you? There's only one species that we know of that has deliberately, consciously, knowingly tried to destroy another sentient species without any serious attempt at communication or warning. We're the ones. The first xenocide failed because the victims of the attack managed to conceal exactly one pregnant female. The second time it failed for a better reason-- because some members of the human species determined to stop it. Not just some, many. Congress. A big corporation. A philosopher on Divine Wind. A Samoan divine and his fellow believers on Pacifica. Wang-mu and I. Jane. And Admiral Lands's own officers and men, when they finally understood the situation. We're getting better, don't you see? But the fact remains-- we humans are the sentient species that has shown the most tendency to deliberately refuse to communicate with other species and instead destroy them utterly. Maybe the descoladores are varelse and maybe they're not. But I'm a lot more frightened at the thought that we are varelse. That's the cost of using the Little Doctor when it isn't needed and never will be, given the other