“By harvesting the best of them—their strength, their will, their creativity. All of it encoded in their DNA.” He held up a jar of blood and tissue, then peered into her eyes. “Kira, what do you think is going to happen when the world ends?”

“We survived it once,” she said. “We can survive again.”

“We can’t.” He shook his head. “We had a plan for the world, you know. I still believe it would have worked. I designed that biology myself, and it was flawless. But it’s all gone now. It was human nature that made it impossible, human and Partial.”

“So I was right,” said Kira. She looked at Green and Marcus, then back at her father. “I solved the puzzle; I discovered the process you engineered: the secrets buried in RM and expiration and the Partial DNA. I knew there was a plan, and that the plan was for peace, because I knew you.” Her eyes darkened, and she stared at the jar in his hands in horror. “At least I thought I did.”

“That dream is gone now.”

“How can you say that?” she asked. “You were determined to care for the life you’d created; you fought for Partial rights before the Partials even existed. You knew they were destined to be a second-class species, not even accepted as people, and you devised the entire plan to ensure that Partials and humans had to see each other as equals if they wanted to survive. You tried to eliminate racism on a biological level, for all time.” She gestured to the jar of tissue, to his gloved hands red with drying blood, to the Ivies behind him standing silent in the doorways of murdered patients. “How did you go from that to this? How could you ever convince yourself that this was the only way?”