The trigger had been pulled back in my day, Oscar said. Human beings had burned much of the carbon stored on Earth as oil, coal, and natural gas, and the consequences of that would have been bad enough. But it was the discovery of oil deposits in the Equatorian desert, a bounty of light sweet crude, easily extracted and imported by sea across the Arch of the Hypotheticals, that had signed the planet’s death sentence. Maybe we could have burned all our own carbon and survived the consequences, but pumping two worlds’ worth of CO2 into the atmosphere had overwhelmed any conceivable coping mechanism.

I told Oscar that made us sound pretty stupid. No, he said. It was sad but completely understandable. Ten billion human beings without any cortical or limbic augmentation had simply acted to maximize their individual well-being. They hadn’t given much thought to long-term consequences, but how could they? They had no reliable mechanism by which they could think or act collectively. Blaming those people for the death of the ecosphere made as much sense as blaming water molecules for a tsunami.

Maybe so. But it was depressing all the same, and I didn’t hide my reaction. If I wanted Oscar to trust me I had to let him see my feelings. Some of them.

He said I should try to look at it through the lens of time. All this world’s death, all its grief, was finished now. And when the destiny of Vox was fulfilled, a new era would begin: an age in which humanity would consort with its masters on an equitable basis. “Much will be made clear, Mr. Findley. Miracles will become possible. You’ll see. You’re lucky to be aboard Vox at such a time.”

“You really believe that?”

“Of course I do.”

“On the basis of a few prophecies?”

“On the basis of the calculations and inferences of the founders of Vox. Those calculations were sound enough to carry us across the oceans of a half dozen worlds. And sound enough to get us to Earth.”

“A dead planet.”

He smiled. Oscar had held back a nugget of information, like a stage magician waiting for the right moment to pull a paper flower out of his sleeve. “Not entirely dead. We have new images from Antarctica. Look.”