Even if it all grinds to a halt tomorrow, at this point it won’t make a difference anymore. It’s the end of an era, possibly of civilization too, at least this particular flavor of it.
it would make a huge difference. sure, we can't undo the damage that has been done, but things can and will get way, way worse as we carry on without changing anything.
The human species might have a built in self-destruct / self-limiting mechanism, which is world war, possibly nuclear war, which might end up saving the planet in the really long term?