Skimmed through your very thorough slides. Thanks for putting this all together.
My favorite publication on global warming is a grade school-level report that the US federal government sponsored way back in 1997: https://atmos.uw DOT edu/~dennis/RTN4.pdf
(Then, of course, the Trumpublicans took over the government and nothing like this was ever produced again.)
I'm afraid I think we're doomed short of engineering some some sort of positive undertaking -- something to remove incredibly immense amounts of CO2 from the atmosphere is the one possibility I can think of -- to address the problem, recognizing that you hold geoengineering to be a bad idea. And recognizing that the scale of such a thing would have to rival that of all of industrialization ... but at least it's something that some committed people with resources can do on their own, without requiring buy-in from the rest of the world; THAT is the quality I think is desperately wanted.
But everything else is negative undertaking: getting basically everyone NOT to do various things. And the record of our species in managing things like that isn't even spotty; it's horrendous. There are a lot of substitute technologies now that could take a chunk out of our carbon footprints and some passive efforts like just insulating buildings better, but I don't see these being implemented quickly enough to keep us from going over the cliff we're rushing headlong toward.
And I think the first drop in the cliff that we hit will be the tertiary effect of a refugee crisis on the order of ten times as bad as what we've seen -- and dealt with so abysmally -- so far. I think that hits in my lifetime, and that it throws a huge wrench into whatever we're working on otherwise, likely in the form of a lot of wars of various sizes.
So there's my cheery message for the day.