Basically 80% of the new Dune moviepic.twitter.com/0uUeWJzKPx
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When you do the math while writing science fiction, you quickly realize the absurdity of it all, anyway. That may be part of what tempts them. The tech to travel the stars is planet-shattering. Interstellar travel and any level of militaristic culture very likely can't co-exist.
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