You in a masochistic mood today, Tea?I think the idea that Homo sapiens is literally facing extinction is an extreme interpretation of the phrase "humanity is doomed." If you take it as shorthand for "human society as we have come to know it is doomed", and look at events that are realistically predicted to happen this century - widespread collapse of nation-states, resource wars, large parts of the planet becoming uninhabitable, many millions of climate refugees - then it's simply an acceleration of things that have been going on for years.
Climate Change in the American Mind: May 2017
Our latest survey covers belief in global warming, perceived risks, and worry.
Four in ten Americans (39%) think the odds that global warming will cause humans to become extinct are 50% or higher.
International poll: most expect to feel impact of climate change, many think it will make us extinct | YouGov
New YouGov study of 30,000 people in 28 countries and regions uncovers noticeable differences in attitudes between East and West
And:the possibility that climate change will result in a new World War, or human extinction [is] a majority or plurality view in most countries
Yeah, that was really close! A few hundred people in a country of 300 million broke into a building! We almost lost the American system of government!Worth pointing out that some people who are quite serious about the threat posed by Beelzebub recently tried to ward off the American government.