But like everyone else he had been raised and educated by Spin survivors, people who believed they had lived through the most momentous turning point in human history. And maybe they had. The aftershocks of the Spin—wars, religious movements and countermovements, a generalized human insecurity and a corrosive global cynicism—were still shaping the world. Mars was an inhabited planet and mankind had been admitted into a labyrinth as large as the sky itself. All these changes had no doubt been confounding to those who endured them and would be felt for centuries to come.

But they had also become a license for an entire generation's lunacy, and that was less easy for Brian to excuse. Many millions of otherwise rational men and women had reacted to the Spin with a shocking display of irrationality, mutual distrust, and outright viciousness. Now those same people felt entitled to the respect of anyone Brian's age or younger.

They didn't deserve it. Lunacy wasn't a virtue and decency didn't boast. "Decency," in fact, was what Brian's generation had been left to rebuild. Decency, trust, and a certain decorum in human behavior.

The Hypotheticals were the causal agent behind the Spin: Why would anyone want to communicate with them? What would that even mean? And how could it be achieved by a biological modification, even a Martian one?

"What this technology does," Sigmund said, "is modify a human nervous system to make it sensitive to the signals the Hypotheticals use to communicate among themselves. Basically, they create a kind of human intermediary. A communicant who can translate between our species and whatever the Hypothetical are."

"They actually did this?"

"The Martians won't say. It may have been attempted on their planet, maybe more than once. But we believe the technology, like the longevity treatment, was carried to Earth by Wun Ngo Wen and released into the general population."

"So why haven't I heard more about it?"

"Because it's not something universally desirable, like an extra forty years of life. If our intelligence is correct, it's lethal if attempted on an adult human being. It may be what killed Jason Lawton, way back when."

"So what good is it if it's lethal?"

"It may not be lethal," Weil said, "if the pharmaceuticals are delivered to a human being in utero. The developing embryo builds itself around the biotech. The human and the alien growing together."

"Jesus," Brian said. "To do that to a child—"

"It's profoundly unethical, obviously. You know, at the Department we spend a lot of time worrying about Fourths, about the harm that can come from cultists engineering changes in human biology. And that's a real, legitimate problem. But this is so much more shocking. Really, deeply… evil is the only word for it."

"Has anybody actually done this on Earth?"

"Well, that's what we're looking into. So far we have very little hard evidence or eyewitness testimony.