Status Updates From Dust (Silo, #3)

They made sure the destruction was complete so they could control it.'
'They wanted to make sure the only pockets of people who survive were in their pockets,' Charlotte said.
'Exactly. They weren't trying to save the world, they were trying to save themselves. Even if we'd go extinct, the world would've gone right on along without us. Nature finds a way.'

'There was a tine when I thought this was a good thing,' Donald said. 'What they did, trying to save the world. They had me convinced that a mass extinctions was inevitable, that a war was about to break out & claim everyone. But you know what I think? I think they knew that if a war broke out between all these invisible machines, that some pockets of people would survive here and there. So they built this.