I give it the tiniest slimmest of chances to succeed. Below 1%
Too much regressives & right wingers. Entire, countries sometimes.
Plus, a handful of country(USA, China, india) are so overwhelmingly disproportionately polluting compared to the rest of the world ( or will massively increase in the next decades in the case of India ) that if all 3 are not all in into it, nothing anyone else does matters. And I don't believe any of those 3 will do enough.
So regardless of what the rest of the world does, I do t believe it matters. I still think they should tho, because if all 3 DO in fact make it, if the rest didn't, it still won't work either. So, achieving a largely global goal is even impossibl-er in my opinion
We are are fucked as is. A way to 'solve' this is a global collapse in population, but that wouldn't be very nice either.