posted by gut
We don't have to speculate - there are many democracies with multiple parties, and there is absolutely no evidence they function better.
You're not changing anything voting 3rd party - that's the political equivalent of virtue-signaling. Elections are about getting your base to vote, and their base to stay home. 3rd party voters are viewed the same as people who don't vote - ignored and irrelevant.
Eh, as far as I can tell, you can't help yourself to any given other nation as an accurate test case. There are virtually innumerable cultural and historical differences that taint such a one-to-one parallel. It's the same reason you can't look at Japan's gun laws and try to apply them here expecting the same result. Too many other variables at play.
And regarding voting for third-party, you kind of illustrate my point here. If we assume, as you suggest, that third-party voters are viewed the same way as people who don't vote, and people who go to the voting booths place a high priority on their vote "counting" (I'd argue it still doesn't matter that much), they're probably going to vote for a major candidate, and this assumption becomes part of what perpetuates the unnecessary dichotomy. The dichotomy, in turn, makes the assumption true. It's a self-fulfilling prophecy.
Moreover, the fact that you can honestly say (and I agree with you) that at the present time, you don't change anything by voting third-party is effectively taking a portion of the population who did take every bit as much civic action and making them irrelevant without justifiable cause.
Frankly, how much would say is changed by voting for one of the main two parties? Doesn't seem like much there either.
How you've framed elections is, it seems, pretty accurate, but I'd argue that's hardly what we should settle for or view as a wash with any other system. When you only have one other candidate, campaigns can be run much more effectively on a platform as simply being 'not the other guy'. When you have 2-3 other possibly viable candidates, you see campaigns swing more to emphasize the virtues of voting FOR a candidate as opposed to against the other candidate. Hell, that's what we see through most of the primaries. When there's a field, campaigns have to distinguish their candidate instead of trying to smear other ones, not to mention the fact that there would theoretically be an increased pressure to perform while in office, since you'd have more candidates offering to do what you don't/cant' in office, and it won't work to just try to campaign against one of them in a reelection bid.
Shoot, it really can be viewed as similar to talent pools in athletics. You got two guys trying out for QB? You might get a good one, but odds of you getting a good one are better if you have those same two plus ten others.
As for calling it the equivalent of virtue-signaling, I'd only agree if you're intending to make your vote known. Otherwise, there's no "signaling." But I get your point.