EA considerations regarding increasing political polarization - Alfred Dreyfus, 2020
Adapting the ITN framework for political interventions & analysis of political polarisation - OlafvdVeen, 2020
Thoughts on electoral reform - Tobias Baumann, 2020
Risk factors for s-risks - Tobias Baumann, 2019
(Perhaps some Slate Star Codex posts? I can't remember for sure.)
I intend to add to this list over time. If you know of other relevant work, please mention it in a comment.
Also, I'm aware that there has also been a vast amount of non-EA analysis of this topic. The reasons I'm collecting only EA analyses here are that:
Great, thanks for adding these to the collection!