Instead of just casting one vote for one candidate, voters rank the candidates: 1,2,3, etc. If no candidate receives a majority of the #1 votes, the candidate with the least total of #1 votes is eliminated. The second choice votes from these ballots are then transferred to the other candidates. The ballots are recounted, and candidates are eliminated in this fashion until 1 winner emerges with a majority of the vote.
Worth considering/supporting, I think. The fact that third parties are realistically nothing more than “spoilers” in this country is disappointing.