• joe
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    6 hours ago

    Do you understand what the spoiler effect is? It’s sometimes called “splitting the vote”.

    It’s why having, for example, two left leaning candidates and one right leaning candidate results in a win for the right-leaning candidate. With plurality voting the candidate with the most votes wins, without regard for whether that candidate has majority (more than 50%) of the vote.

    Let’s imagine that we have a population of 100 people and the demographic breakdown is that 60 of them are left leaning and 40 are right leaning. In a two party vote, the left leaning candidate wins. Now imagine a three party election with a liberal, a progressive, and a conservative. If more than 20 left-leaning people vote for the progressive candidate, the conservative wins. Since the voters know this, they have strong incentives to vote for the left leaning candidate they think is most likely to get the most votes, not the one they most align with.

    It is technically possible for everyone on the left to all switch parties at the same time, but realistically impossible, especially considering that many people do prefer liberals over progressives.

    The only way we get more than two parties is by abandoning plurality voting, and if you’re voting for a third party in a plurality voting system, you’re helping the candidate you least align with.

    • brachiosaurus@mander.xyz
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      6 hours ago

      The world isn’t divided in left and right, you are still assuming that voting for a third party is voting for blue.

      • joe
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        6 hours ago

        My examples assume those things, but you’re free to switch them around as you like; it doesn’t change the underlying principle.

        The key element of the spoiler effect is that a majority isn’t required. If you have 100 candidates and 100 voters, someone can win with only 2 out of 100 votes.

        I am guessing that you very strongly do not want this to be true, but unfortunately that doesn’t make it so.

        The good news, assuming you’re an American, is that the states dictate how voting works. Some states, like Maine, have moved away from plurality voting for some elections. In those states there is no harm in voting third party, as long as your vote finalizes on the major party you most align with. If your state still uses plurality voting, now you know exactly what to push for to get more representative voting in your state.