I am also MikkW on Lesswrong. I write more there than I do on here, especially on Shortform
Natural selection is the ultimate selector. Any meta-system that faces this problem will be continually outcompeted and replaced by meta-systems that either have an architecture that can better mitigate this failure mode, or that have beliefs that are minimally detrimental to its unfolding when this failure mode occurs (in my evaluation, the first is much more likely than the second)
A note: This was written mostly 8 months ago, and I no longer entirely endorse everything I say in this essay (though I broadly agree with the main thesis that PGMs are worth investing time and energy to promote and create). I have cut the most egregrious parts I no longer endorse, and have lightly edited some other parts, however I haven’t spent a significant amount of time reworking this, and some parts are left being less precise than I would desire; however, I feel that most of the points in this essay are worth making and reading, and I have other things that I need to do other than work on this post; I have chosen to spend a few hours revisiting this essay, as opposed to allowing this to sit forever in my notes unpublished, and present it as it is. Hopefully what I have said on the subject is of use, and I apologize that I haven't made it more thorough than it currently is.
In practice, states decide how to vote in both congressional and presidential elections (Maine for example, uses ranked choice for both). It is true that getting rid of the electoral college requires a federal amendment, but the electoral college isn't actually that bad; the big problems can be solved within its framework
Tl;dr: We should argue before the election, and build a consensus when it's time to actually get stuff done
I don't think reducing (tribal) polarization is at odds with agonism. There's plenty of room for healthy debate about what direction we should go in, but when in comes to actually deciding who has power, we want to track the median of what people think, not sway back and forth between two extremes (which is a compromise in and of itself)
I think it's worth being aware of lock-in effects; while I agree that it's unproductive to put down alternative approaches, it's also important to do what we can to avoid locking in a suboptimal choice- if Ranked Choice gets locked in over Approval Voting, and if Approval is actually better, it may be very hard to change it in the future, leading to much long-term disutility, perhaps even more than if the shift away from FPTP takes a little longer in the process of getting it right.
But I do agree that bickering and putting alternatives down probably isn't the best way to mitigate lock-in
From a total view, I think this does outline a potentially compelling case against the climate change argument, but I don't think it's compelling from an average point of view. Even from an in-between perspective (which I think roughly represents my feelings) which evaluates overall welfare as the product of average quality of life times the square root of population, it seems that marginal hits to the climate may outweigh marginal gains in quality of life.
Even from a totalist POV, it's important to consider lives with negative value. It matters where the line is drawn- some people may feel all lives have positive valence, others may set a high standard, and say that a life with positive valence must have very little suffering, even an absence of suffering that may be fairly unheard of in modern life. By having children, you might increase the value that your life contributes to overall welfare, and contribute the lives of your children, but have an impact on many people which changes their lives from making a positive contribution to a negative contribution, or greatly increases the suffering of a person who already has a negative-valence life.
This certainly isn't to say that I think you're wrong - I think the structure of your argument may be usable to make a compelling case which addresses my concerns, and in general I do feel (though am not certain) that on net, the average person will contribute more to other's well-being than they take away.
In this case "improve gradually over time" could take place over the course of a few days or even a few hours. So it's not actually antithetical to FOOM