The Dark Forest Hypothesis assumes that we can use sociology to figure out what extraterrestrial intelligences might be like or might want. But can we? What’s become of sociology these days?
The Percolation Hypothesis holds that they can’t overcome the laws of physics any more than we can and that colonies would lose touch with the home planet due to slow communications, thus losing interest in space travel goals. But now, if there is a purpose behind the universe, maybe we and the aliens weren’t intended to meet. That was C.S. Lewis’s view.
4. It makes the most sense for the aliens to have become artificial intelligences, say many theorists,