I think its an artifact of pervasive guilt and shame. Much of the developed world enjoys the highest standard of living that humans have ever experienced, and d

I think its an artifact of pervasive guilt and shame. Much of the developed world enjoys the highest standard of living that humans have ever experienced, and did little to nothing to get there. It feels like flying too close to the sun, an overdose of good. To satisfy a sense of justice, the logical conclusion is judgement for millions that commit (perceived) poor behaviors without consequence. People have fervently believed in apocalypses for thousands of years, in at least ever other generation. The fact of the matter is that we are evolved from people that survived by exterminating other people groups. We have deep genetic memories of actual apocalypse, from tribes to nations. We are evolved to anticipate war and destruction- and adapt. I believe that most people don't actually believe in 100% extinction of humans; they believe that there will be a relatively few amount of survivors, and hope to be among them.