Cosmic Sociology

From the prologue to Cixin Liu’s The Dark Forest (follow up to The Three-Body Problem):

“See how the stars are points? The factors of chaos and randomness in the complex makeups of every civilized society in the universe get filtered out by distance, so those civilizations can act as reference points that are relatively easy to manipulate mathematically.”
“But there’s nothing concrete to study in your cosmic sociology, Dr. Ye. Surveys and experiments aren’t really possible.”
“That means your ultimate result will be purely theoretical. Like Euclid’s geometry, you’ll set up a few simple axioms at first, then derive an overall theoretic system using those axioms as a foundation.”
“It’s all fascinating, but what would the axioms of cosmic sociology be?”
“First: Survuival is the primary need of civilization. Second: Civilization continuously grows and expands, but the total matter in the universe remains constant.”

“Those two axioms are solid enough from a sociological perspective … but you rattled them off so quickly, like you’d already worked them out,” Luo Ji said, a little surprised.
“I’ve been thinking about this for most of my life, but I’ve never spoken about it with anyone before. I don’t know why, really. … One more thing: To derive a basic picture of cosmic sociology from these two axioms, you need two other important concepts: chains of suspicion, and the technological explosion.”
(pp. 13, 14)

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