IMO humanity going completely extinct has always been an unlikely outcome, at least from direct climate change causes like food shortages, rising seas, etc. Tho

IMO humanity going completely extinct has always been an unlikely outcome, at least from direct climate change causes like food shortages, rising seas, etc. Those are too solvable by just having less people around and/or in different places. Even secondary causes like war are unlikely because eventually one or both sides will lose the ability to fight across the Pacific and Atlantic, kill enough people the resource crisis is alleviated, or humanity and rationality kicks in eventually and agreements are reached to stop fighting. The much more likely is life just gets really bad for a while or at the outside possibility things fall apart enough we slide back a few centuries in some industries. If we go too far back power becomes an interesting issue because we've exploited most of the cheap easily accessible power sources so successor civilizations won't have the easy coal deposits to power a second industrial revolution.