Allow an ignoramus rebuttal Geoff - the occurrence of mass extinction of human kind on earth due to anthropological climate change seems to be far nearer than our ability to successfully become a multi planet/multi galactic species, wouldn’t you think?
Most people are happy most of the time and happy they were born (says happiness research), and we're nowhere close the Laniakea supercluster's carrying capacity, so there's room for plenty more sentient intelligent life.
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No, global warming is not an existential risk, IMHO. Not compared to nukes, engineered bioweapons, and AI.
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This is a pretty good place to start https://en.wikipedia.org/wiki/Sonja_Lyubomirsky#The_How_of_Happiness …
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In that vein though, what's your take on Peterson's idea that "a million more geniuses couldn't hurt"? Just to be up front; I strongly disagree, and I use it as an example of how even in his general admirability he is way off course.
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Peterson is right.
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Additionally: far-below-replacement levels of offspring would have seriously negative consequences for the living population, eventually
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If you can (ever) get as far as Proxima Centauri, I'll be impressed. But we're not all that close to earth's capacity either, so no worries.
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