Grabby Aliens Model (Hanson 2021)
conceptDarknet & Cyber
If loud, fast-spreading aliens exist, we humans showed up surprisingly early to the party.
Who they are
The Grabby Aliens model, proposed by economist Robin Hanson in 2021.
What they do
It's a math model splitting possible alien civilizations into 'loud' ones that visibly expand across space and 'quiet' ones that don't.
How it works
It uses three inputs — how fast civilizations expand, how hard the evolutionary steps to get there are, and when they start — and predicts that humanity is arriving puzzlingly early, with any grabby aliens eventually setting a deadline on how far we can spread.
Why it matters
It offers a different answer to the 'where is everyone' question and directly contradicts the rival 'Dark Forest' idea that everyone stays hidden.
The engine's record — word for word
Mathematical model dividing theoretical civilizations into 'loud' (grabby — expand visibly at fractional-c, permanently transform their region) vs 'quiet' (non-expanding). Three parameters: expansion speed, birth power (hard evolutionary steps), origin date. Empirical prediction: humanity is arriving puzzlingly early; if grabby aliens exist, they will eventually set our expansion deadline. Contradicts Dark Forest visibility-doctrine.
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