Thank you for this insightful analysis. I only disagree with you on one point: that there will be historians of the future, or survivors at all.
Political idiocy is only one of the forces destroying life on this planet. We are now officially in the 6th great extinction event of earth, with extinction rate 100 times that of the recent past. Climate change is only one of the causes, and that alone is sufficient to repeat the 4th extinction event 250 millions of years ago, that led to 96% of species dying out. It took 10 million years for the re-emergence of complex life.
And that was without nuclear bombs, plastic in the oceans or deadly poisons distributed globally.