Not having a political system that leads people to polarisation is probably a good start.
A result in the vicinity of Hotelling's Law with vote capture rather than profit maximisation.
It's a damnable doom spiral emergent from a system setup by founders largely opposed to party politics.
If team "east side" and team "west side" are butting up against each other with the hope of the 50%±1 of the population behind them all being on their side, but suddenly one or both of them has to face factions behind them splitting off — well, it's like how often the US Democrats are upset about the US Green Party "splitting the vote" (do US Republicans have the same reaction to the Libertarians? Libertarians barely get in the news here on the other side of the Atlantic).
I think that without proportional representation, that just pushes the half-way point further from the new party. Can anyone who has actually studied this confirm or refute? I'm in danger of LARPing XKCD here: https://xkcd.com/793/
Then there's sortition. I'm intrigued, but have no opinion on how good it would be: https://en.wikipedia.org/wiki/Sortition
This is especially clear if you compare it to more modern democracies who had fallen ill to fascism before and had to harden their rules after the devastations of WWII. I don't think the dysfunctionality of democracy both in UK and the US is a coincidence. Up to a few years ago the last mental hurdles have fallen and bad actors discovered that there are surprisingly little hard rules preventing them to play the game in bad faith — and so they did. The media landscapes in the UK and US (Murdoch!) did their part.
US commentors I discussed with always pointed to free speech, I just don't hope they mean it like Elon Musk: Free speech, as long as it is the right kind, and I am deciding which is.
This is, after all, Hacker News. The demographic here isn't that different from Reddit's, as much as many would try to deny.
It's amusing to me that I have no idea if you mean to:
1. Agree, yes, center-left to liberal bubble.
2. Disagree, it's not a center-left to liberal bubble.
3. Sardonically point to something else by comparing to Reddit.
4. Other?
This one.
It's baffling why america treats political parties like sports teams
Polarization is a centrist cope that has no actual content. Some people actually have values and there is a sincere disagreement about values for some people. Only centrists who have no values and love the status quo think people having values is a problem.