Joe Biden (+General Biden/Harris Administration) Arrow's theorem is a problem for every voting system so it can't be an argument for one system over the other. Some of the issues he raises are purely theoretical as well. The likelihood of a perfect distribution drops rapidly with more voters and multiple candidates with ranked choice voting.
What ranked choice voting ensures is that candidates, that a large portion of voters consider total shit bags, won't stand a chance thereby significantly raising the legitimacy of whoever gets elected.
Yes, there's a chance someone with a plurality of primary votes doesn't win the election but that's neither here nor there, because the converse in the current system is that a person with a plurality of votes wins whereas we know that more than 50% of voters doesn't want that candidate. (Even worse, we've seen Trump and Bush win without even reaching a plurality of votes). Without additional information, the cautionary principle means we should assume more than 50% of voters voted against the candidate with the plurality of votes. By distributing the secondary votes, we obtain information that is otherwise unavailable making the end result more informed as well. This illustrates as well that with ranked choice voting a vote retains value, even if your primary choice loses.
For politicians to win secondary or even tertiary votes, they will have to consider to a larger extent what the greatest number of people want instead of what enough people want. That effect is assumed to lower the level of polarisation.
The American Electoral College system for electing the president was intended in part to protect the government from populist movements; that is, it was expressly anti-democratic. The idea was that if the electorate made a stupid choice, or the election were affected by foreign influence, the Electoral College would vote right. I see on Wiki that there have been about 165 instances of faithless electors, but no election results were ever changed. In my opinion, the Electoral College failed in 2016 to do the job it was created to do. So much for one man one vote. — tim wood
That only makes sense if you don't have ranked choice voting. And even so,
if a populist movement would win a majority of the votes it's fucking elitist to then say "but it's wrong". That's rather the point of democracy that at some point if enough people want something it should happen. It's up to policy makers and judges to keep whatever populist idea has gripped the country within the boundaries of the constitution and international treaties.
I would like to think that notwithstanding what I think was their failure in 2016, that if Trump had worn his swastikas on his sleeve during the 2016 campaign, the Electoral College would have the done its job and no matter how many popular votes he got, they would not have elected him president. — tim wood
I have no clue on what you base this optimism on. You've already seen it fail in 2016 and yet you still think it works? Party politics prevents electors to make ethical choices.