Ranked-choice voting includes different systems that can help elect majority winners, ensure minority representation, or lead to majority sweeps in elections. The article discusses five main versions used in US elections, like alternative vote and single transferable vote, and how they affect outcomes. Different rules can produce different results with the same votes. Strategic issues like minority representation and party cues are important for political strategists to consider. Problems like 'majority reversal' and undisciplined third-party voters can arise. The article also mentions tactics like managing votes to influence outcomes. The Progressive Era reforms had mixed success in improving minority representation and the durability of ranked voting.