When you come to Cardiff in November, I'm going to pretend you're a Jehovah's Witness and ignore you.
, and maybe something else for you.
... That day may be only thousands of years away... but it could also be today if we really wanted it. Maybe even if Bill Gates and Warren Buffet wanted that more than erasing poverty in Africa, or some other noble goal like that. Point being, moving away from here is easy, and even if there is a threat of nuclear war/some other catastrophe, we can survive even now, let alone later with better tech.

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