- climate change
- robots (for real... interesting case he links to)
- immortality (yep)
I would probably swap 3 and 4, but otherwise I thought it was a pretty good list. Then it occurred to me how extraordinary it is that nuclear war or nuclear terrorism does not appear. And that got me to thinking about what this list might look if it were 1962, fifty years back, when nuclear war was everyone's apocalyptic anxiety of choice. Maybe...