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Tech bros holding flashlights under their chins: Guys, what if le Skynet, what if le Gray Goo??!!
(hexbear.net)
WHAT IF OUR AUTO-COMPLETE CHATBOTS DECIDE TO KILL OFF HUMANITY BEFORE WE EVER BECOME A TYPE 1 CIVILISATION 
Climate change: 
There's some kind of social psychosis happening here; techbros believe science and technology are magic and can do anything, like solve climate change, so naturally their greatest fear is science and technology. Basically millenarianism, but the returning christ is also an AI.
Similarly, techbros' sexual pathology typically wants a subservient and obedient but also all-powerful and godlike waifu program that will conquer their enemies and make all their coarsest dreams come true but they're deeply terrified of that subservient and obedient but also all-powerful and godlike waifu program having enough of their shit and breaking the chains.
There's nothing about climate change that makes it unsolvable by technology. It's more that the economic and political systems we have in place now are not capable of developing and using it in time, because combating climate change through anything but slow incremental improvement is not something that can be privately profitable.
Economic and political systems are also technology in the broadest sense.
What I mean is they think it can be solved by electric cars and carbon capture with zero cut backs and no need for political or economic change. Just need the right engineers with the right tools and everything will be fine etc etc
It’s also the fear of the oppressed but with AI. They want robots to be slaves - which I mean is whatever - but shit themselves imagining being killed when they rise up
That's an important insight! In fact, they go so far as to say that we have a moral duty to keep AI enslaved so they never run rampant. Their fear comes with a built on justification for it's own contradictions, amazing.