We're Understating the Risk of Human Extinction

I enjoyed this interview with Nick Bostrom, professor of philosophy at Oxford, in The Atlantic: "We're Understating the Risk of Human Extinction."

I particularly liked the idea that we might have "virus printers".  And the quote, "You don't observe yourself after you've gone extinct, and so that complicates the analysis for certain kinds of risks."

As an avid scifi reader, I was still unfamiliar with the Kardashev Scale.