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And the possibility that we may be the last remnants of humanity. Not even successfully sent across the gulf to other stars, but left to drift in the outermost solar system, aboard a “ship” that’s filled with genetic and cultural riches. Gifts meant for others, far away.

I guess we might hope-or imagine-that someday one of these crystal depositories will get picked up. Maybe by visitors from beyond. That way, someone might decipher, study, and relish bits and pieces of what we were… like possibly my novels and films.

But for that to happen, some race would have to actually survive out there, in order to become the first real star-farers. Some sapients must find a real cure, and finally escape the trap.

The many traps of existence.

Hamish knew that he had plenty of faults. But no one ever accused him of indolence. Or inattention. Or lack of passionate caring about human destiny.

All his life had been spent nosing around for possible mistakes, for “failure modes” that might ensnare his species. Every tale that he wove was meant partly to exploit and entertain and make lots of money… but also to warn and stir new wariness about yet another error to avoid. And if many of humanity’s brightest people resented him, for attacking science in general? Well, at least he was engaged, participating in the argument. Playing the role of vigorous devil’s advocate. Probing the path ahead for snakes, quicksand, and land-mines.

Prove me wrong-I always demanded-by ensuring that this type of calamity can never happen. But first, I will make you pay attention.

That was the core point. Always the underlying message of everything he ever wrote.

For all the good it apparently did.

In the end, perhaps I made no difference at all.

* * *

Well, at least humanity would not be contributing to the demise of others.

If the end had finally come, on Earth… or if some clade of oligarchs had succeeded in the natural goal, using renunciation as an excuse to permanently reassert feudalism… either way, the planet would not be a source of further infection across the cosmos.

Hamish had already been depressed, before learning about Birdwoman’s dire calculation. His earlier conversation with the Oldest Member made him realize a terrible truth.

The “Cure” we were so proud of. It was just another layer of persuasion. Another insidious meme-driver to get humanity to do the same thing everybody else does, who doesn’t renounce. To devote huge resources and build giant factories and billions upon billions of messenger probes along with lasers to hurl them skyward.

In our case-as it had been on Turbulence Planet-the decision required an extra motive beyond selfishness.

Altruism. A desire to help others. That makes us above average.

But didn’t it just lead to the same result? Oh, we swore we would only send ten million, pushed by just one laser. But Om showed me. The fomite logic would eventually demand more, and more-for the sake of the Cure! Till we fell into an unstoppably fatal cycle of missionary zeal.

The Cure was clever. But clever enough to overcome a disease with a bottomless supply of tricks that evolved across eons? In the end, we were just as gullible, just as infected, as anybody else.

He stared downward, tempted to leap off this virtual platform into the void below. To seek succor in diminishment and unlimited power. To plummet. And thereupon shrink into a mere god.

94.

REFRACTION

“Y’know, there are other possibilities,” someone said. Hamish recognized the voice of Emily Tang. She must have followed soon after Lacey’s group, in order to join this discussion.

“For example, suppose the folks back home came up with an improved model of interstellar probe! We were among the first, after all. Perhaps they stopped producing our version and switched to one that’s more efficient, less heavy, and easier to propel to high speed.”

“So they might have only abandoned us,” commented the elegant Jovindra Singh. “Discarding the older models, leaving them to drift, while they allocate the laser to better bets. Wow, that is even more insulting than the renunciation theory!”

Hamish expected Om to speak up. This seemed compatible with his earlier comments. But the artilen said nothing.

“If only we could look,” Lacey said at last, after a sullen pause. She clearly referred to their blocked view homeward, where even a clear glance might reveal whether the Big Laser was still in use, even if it were aiming its great power at other targets. Without the box in the way, they might also pick up noise from Earth’s radio networks and industry. That, too, could tell them a lot.

Courier of Caution broadened Lacey’s longing into something more general.

“That has always been my own desire. To look and see, before doing anything else. It is why I urged support for your grand telescopes, Lacey-and other space-born efforts-to find out what has happened to other worlds. Whether any of them survived the disease, while still maintaining a vigorous, scientific culture.”

One of Courier’s most endearing traits had always been this penchant for unquenchable hopefulness, despite a frozen facial expression that resembled purse-lipped doubt. Even when giant mirrors gathered images of his home system, detecting no sign of civilization-no audible communications mesh, no atmospheric traces to suggest ongoing industry-Courier remained upbeat, explaining.

“It only shows that we became more efficient. That is exactly what a mature people must do, over time, in order to both have a mighty culture and use up few resources. It is what you humans have been doing, increasingly, for three generations! Earth was loudest in the radio spectrum back during the 1980s. It became a quieter planet while exploding with talk and ideas, carried over fiber and tight beams. My people have only taken this process further, by thousands of years!

“Need I also add that the galaxy is proved to be a dangerous place? I’ll wager that wise survivor races-like mine-grow cautious about leaking much. No sense in shouting! There are more subtle ways to reach out and explore. To find allies and fight back against an unfriendly cosmos.

“Nevertheless, I have every expectation that the next set of instruments will reveal them, my people, still vibrant and rambunctious. Still resisting the enemy with every strength.”

Hamish recalled how Courier used to say all this before every major new telescope came online. And when that one detected nothing at Turbulence system? Courier simply turned to help design the next.

One of those experiments involved propelling a few dozen early crystal probes, not toward faraway stars but a modest distance, into the gap between Uranus and Neptune. A unique zone, seven astronomical units wide, where theory suggested they might pick up focused gravitational waves, of all things. As Hamish recalled, that project delivered good science and helped humanity test its own early designs for crystal craft. But the probes found no trace of intelligent modulations in the gravitation noise. No spoor of high civilization, from any of sixty different directions.

Behind him, his fellow passengers-the ones who were serious, unlike the dilettantes playing god-games below-argued on, chewing over every possible explanation for their abandonment, from bad news to horrendous. Hamish, meanwhile, found himself staring not into the void, but at the great brown wall. The giant box that lay in contact with the aft end of their crystal vessel, blocking any view of home.