by Tanada » Tue 12 Dec 2017, 09:43:55
$this->bbcode_second_pass_quote('Plantagenet', 'G')lobal warming will continue unchecked until coastal cities are flooded and rich agricultural lands around the world are underwater and abandoned. Hundreds of millions of people will be displaced, becoming landless, starving hordes, demanding their governments "do" something.
Then it really will get bad, with conflicts over the remaining agricultural land leading to nuclear war.
Cheers!
I give this a reasonably high probability as well. AGW is happening and will continue to have effects for centuries. Sadly a large proportion of humans are convinced change=death even though they themselves rush out to buy the latest version of whatever consumer product is popular. I do believe we will become extinct eventually, but this could be evolution to a different life form that is simply different enough to no longer be able to interbreed with humans alive today. The definition of evolution is gradual change with bursts of speciation and the difference between species is the inability to produce viable offspring.
Horses and Donkeys are different species because they can only produce sterile offspring. Yak and Cattle are sub species because half of the offspring born are re-productively viable, specifically the females are able to reproduce with males of either parent line. Dogs/Wolves are able to breed with Coyote and produce viable offspring even though in the past scientists thought they were so different that they were different species. It turns out from a genetic POV Coyote are just a sub species of wolf that specializes in survival in a different environment and when you remove the natural Wolf population the Coyote population fills back in the missing niche in the ecosystem. Both have no problem interbreeding with domesticated dogs because the fact is they are all one over arching species.
We have extensive genetic proof that Humans and Neanderthal produced viable children and that Humans and Denisovan also produced viable children even though initially both were designated different species. Gorilla, Chimpanzee, Bonobo and Orangutan are physiologically very close to humans but so far as we know none of them can produce a living offspring from cross breeding. However even though they are much more distant relatives Baboon organs have been successfully used for organ transplants that have survived for weeks in the new host body. All these factors have blurred the original definition of species a great deal, which was based on simple appearance and ecosystem niche environment.
So I believe humans will some day become extinct, and possibly this will mean no descendants continue to exist but it also may mean our descendants have developed into a truly separate species. To whit, that they can no longer produce re-productively viable children with humans. That is a very long view because Humans and Neanderthal were separated for about 350,000 years and yet we know they produced re-productively viable children when they started living in the same territory about 60,000 ybp.