The Dark Forest, Aliens, And A Hostile Galaxy (Narration Only)
Science & Futurism with Isaac Arthur
00:00
The Lotion of Loud, Grabby, and Quiet Aliens
Loud aliens are distinguished by possessing three characteristics: They expand into a galaxy fast, they last a long time, and they make visible changes to those areas they reach. By default that's what we think we should expect to see in any of the universes old and as large as this one. A civilization which is neither of these expanding out at all or ultra slow or enduring but a brief time is a quiet alien. We don't really think there can be unification on policies or enforcement of them unless such a policy is essentially a mathematical certainty everybody converges on.
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