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An older asking of the question from sci-fi stack exchange rather than world building - https://scifi.stackexchange.com/q/12379 https://scifi.stackexchange.com/
by shagie 5y ago
An older asking of the question from sci-fi stack exchange rather than world building - https://scifi.stackexchange.com/q/12379 https://scifi.stackexchange.com/q/12379