Earlier quoted context omitted.
> You want third parties, you need ranked choice voting or something similar. Ranked choice or similar would only give you an occasional third party win here and there, in some small number of electoral districts. It will not give you serious and viable third parties with long living organizations. What you'd need is, proportional voting for the House. Electoral districts the size of at least 10 House representatives…
I lived in Italy for a number of years and am not enamored of proportional systems for several reasons: * Small parties sometimes have disproportionate power in coalitions. * Coalitions tend to not be real stable, leading to unstable governments that can't get much done (ok, for some this is a feature, but for some things, I think it isn't). * People matter, but with a proportional system, the party picks the candida…
Ranked choice means you give your #1, #2, #3 pick etc. Then if your #1 loses, your vote goes to your #2. It prevents these "A vote for [minority candidate] is a vote for [enemy candidate]" situations.
Proportional means each party can elect a number of representatives proportional to the number of votes the party got.
They both empower third party candidates, but in a different way.