I mean, I didn’t say world ending, I said species ending. With climate change we have already observed species going extinct at an increasingly quick pace, and it’s hubris to think we couldn’t eventually be one of them if things continue.

Likewise, the potential for nuclear war seems less unlikely than it did 5 years ago, 10, or 20 years ago, and would wipe out many species and could potentially wipe out humanity, or enough of humanity to permanently reshape the species.

The rhetoric of the entire world ending is extremist, but it’s not sci-fi anymore to imagine that in a few generations there may be no recognizable modern humans, even if there are bipedal hominids still roaming around. It’s not even speculative to imagine a world missing many of its current species, just go to any coral reef and compare it to pictures from 50 years ago.

And because we’re facing several potential species-ending threats which hasn’t happened before 1945, and is worse now than it was then.