It doesn't pay to be smart in interstellar space - once out of the gravity well, most races lose their sentience in favor of longevity, radiation tolerance and stealth
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mutually incompatible I think, though I was careful to say "interstellar space" (the space near stars has tons of energy and visibility, dyson spheres and matryoshka brains aren't out of the question)
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They might not conflict: the most advanced species could evolve in rogue extragalactic star systems.
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