“It’s the schools,” said Kira.

“I told you,” said Haru.

Ms. Rimas was the head of the East Meadow school system, which had dwindled over time to a single school for which she now served as principal. Kira listened with her hand on her mouth as the old woman spoke proudly of the work her teachers had done, the success their system had shown over the years, and the great things accomplished by the graduating students. It was a send-off, a triumphant look back at their hard work and dedication, but Kira couldn’t help feeling sick about the whole thing. No matter how they spun it, no matter how much they tried to focus on the positives, the ugly truth was that there simply weren’t any children anymore. They were closing the school because they had run out of students. The teachers had done their job, but the doctors hadn’t.

The youngest human being on the planet, as far as anyone knew, would be fourteen years old in a month. It was possible that there were survivors on other continents, but no one had ever been able to make contact with them, and over time the refugees on Long Island had come to believe that they were alone. That their youngest was the world’s youngest. His name was Saladin. When they brought him onstage, Kira couldn’t hold back her tears.

Marcus put his arm around her, and they listened to the string of heartfelt speeches and congratulations. The youngest students were being accelerated into trade programs, just as Haru had predicted. Ten were accepted into the pre-medic program Kira had just completed; in another year or two they would begin interning at the hospital just like she was. Would anything be different then? Would infants still be dying? Would the nurses still be watching them die and recording their stats and wrapping them for burial? When would it all end?

As each teacher stood to say good-bye and wish their students well, the coliseum grew quieter, almost reverent. Kira knew they were thinking the same thing she was. The closing of the schools was like the closing of the past, the final acknowledgment that the world was ending. Forty thousand people left in the world, and no children. And no way to ever make more.

The last teacher spoke softly, tearfully bidding her students good-bye. The teachers were joining trade schools as well, moving on to new jobs and new lives. This final teacher was joining Saladin in the Animal Commission, training horses and dogs and hawks. Kira smiled at that. If Saladin had to grow up, at least he could still play with a dog.

The last teacher sat down, and Senator Hobb rose and walked to the microphone, standing calmly in the spotlight. His image filled the coliseum, solemn and troubled. He paused a moment, gathering his thoughts, then looked up at the audience with clear blue eyes.

“This didn’t have to be.”

The crowd murmured, a rustle of movement rippling through the stadium as people muttered and glanced at their companions. Kira saw Marcus look at her; she grabbed his hand tightly in her own and kept her eyes glued on Senator Hobb.