A Rational Pessimist, Realist or Optimist?

Bluey here,

Just calling in briefly to bring everyone's attention to this article about how humanity won't survive another 1,000 years. Apparently the warning comes from one of the 'smartest' humans on my surface:

Food for thought, but goes directly against a good book I've been reading lately: The Rational Optimist: How Prosperity Evolves.

I guess I'll get to see which 'theory' prevails...

Yours for awhile,
Bluey