"I cannot agree with the Evangelical Institute's plan for human slaughter," Fa Zheng said, "However, I must admit, the Evangelical Institute is not killing humans out of evil intentions, but to save the world and ensure the continuation of the human race.
"If it was solely for self-preservation, Yama and those Impermanence beings could have simply settled on another planet, perhaps even bringing along a few, a dozen valued humans. As long as the number isn't enough to continue human history, and they don't explore ways to extend human history."
Long ago, when Gua Tianshi and I discussed Doomsday topics, he mentioned such a pathway to avoid Doomsday.