Bostrum's Black Ball, the Black Ball That Might Be Pulled Out of the Urn

Bostrum compares human creativity to pulling a ball out of an urn. And so far we've been pulling useful balls out of the urn. But what he's very worried about is the black ball, the black ball that might be pulled out of the urn. In a black ball, according to bostrum, is a technology that is just so nefarious that there is no upside,. and it will destroy the civilization which pulls it out of the iurn. A very good interview, a very great insight into just how deep pessimism can go.