What's the most extreme "what if" you've thought about seriously? Example "what if humans could live to 200"
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gene editing - I have many ideas about how it affects society that are totally not crackpot at all
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What if it didn't actually matter whether masses of people were constantly slipping in and out of imperceptibly different universes?
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what if the multiple universe theory is correct and we learn to travel between such universes? What would change? What would we value?
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