Something I think a lot of Silicon Valley-type space enthusiasts really don’t appreciate is that there is nothing we could do, nuclear war-wise or climate change-wise that would make the Earth more uninhabitable than Mars.
Like, even after an End-Permian-style climate catastrophe, or all-out nuclear war, there would still be oxygen and a magnetic field
I know this isn't some new insight, but I still hear people talking about Mars as an "insurance policy" and it's idiotic
Also, people who count the eventual progression of our star to a red giant among the relevant threats to our species' survival don't have a very good grasp of geological timescales
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