First-past-the-post voting
First-past-the-post voting (FPTP or FPP)[1] is a plurality voting system wherein voters cast a vote for a single candidate, and the candidate with the most votes wins the election. Analogous systems for multi-winner contests are known as plurality block voting or "block voting" systems; both FPTP and block voting are "plurality" systems in that the winner needs only a plurality of the votes and not an absolute majority (greater than half).
The term first-past-the-post is a metaphor from horse racing of the plurality-voted candidate winning such a race. ; The electoral system is formally called single-member [district] plurality voting (SMP/SMDP) when used in single-member districts, and informally called choose-one voting in contrast to ranked voting[2] or score voting.[3]
FPTP is one of the simplest electoral systems, and has been used to elect the House of Commons of England (and its successors for Great Britain and the United Kingdom) since the Middle Ages. Its use extends to former British colonies, most notably the United States, Canada, and India. It is used as the primary form of allocating seats for legislative elections in about a third of the world's countries, mostly in the English-speaking world. It is also used to directly elect heads of states in some, although far less than the two-round system. For legislative elections, a country using FPTP typically is divided into geographic constituencies that each elect one member to the legislature using this method.
Notwithstanding its simplicity and antiquity, there are several major drawbacks to FPTP. As a winner-take-all method, it often produces disproportional results, particularly when electing members of a legislature, in the sense that political parties do not get representation according to their share of the popular vote. This usually favours the largest party and parties with strong regional support to the detriment of smaller parties without a geographically concentrated base. Supporters of electoral reform are generally highly critical of FPTP because of this and point out other flaws, such as FPTP's vulnerability to gerrymandering which can create districts distorting representation in the legislature, the high number of wasted votes, and the chance of a majority reversal (i.e., the party winning the most votes getting fewer seats than the second-largest party and losing the election). Throughout the 20th century many countries that previously used FPTP have abandoned it in favour of other electoral systems, including the former British colonies of Ireland, Australia, and New Zealand (these nations now use STV, IRV + STV, and MMP, respectively).
Some countries use FPTP alongside proportional representation (PR) in a parallel voting system. The PR element may add to the disproportionality of FPTP, rather than compensating for it. Others use it in so-called compensatory mixed systems, such as part of mixed-member proportional representation or mixed single vote systems, which aim to counterbalance these. In some countries that elect their legislatures by proportional representation, FPTP is used to elect the head of state.
Terminology[edit]
The phrase first-past-the-post is a metaphor from British horse racing, where there is a post at the finish line[8] (though there is no specific percentage "finish line" required to win in this voting system, only being furthest ahead in the race).
FPTP is a plurality voting method, a plurality meaning the largest part of the whole, in contrast to majority, which generally means more than half of the whole. Under FPTP the candidate with the highest number (but not necessarily a majority) of votes is elected. Sometimes the term relative majority is used to refer to a plurality as opposed to an absolute majority meaning a (standard) majority. The word majority is also sometimes used to refer to the number of votes (or percentage of votes) a candidate won an election with: "Candidate A won the election with a 5000 vote majority" would mean Candidate got 5000 more votes than Candidate B, but could also mean Candidate A won 5000 votes in total, and won.
Even though FPTP is a type of plurality voting, it is categorised as a majoritarian system, even though it is not "majority voting" (like a two-round system is). This is because majoritarian representation (one of the 3 major types of electoral systems alongside proportional representation and mixed systems) is defined by the winner (of an electoral district) getting all the seats, and therefore all single-winner systems (such as FPTP) are majoritarian.
FPTP is primarily used in systems that use single-member electoral divisions. The multiple-member version of plurality voting is when each voter casts (up to) the same number of votes as there are positions to be filled, and those elected are the highest-placed candidates; this system is called the multiple non-transferable vote (MNTV) and is also known as plurality block voting.
When voters have only a single vote each, which is non-transferable, but there are multiple seats to be filled, that system is called the single non-transferable vote (SNTV). When voters have only a single vote each, which is a preferential vote and transferable if necessary, but there are multiple seats to be filled, that system is called the single transferable vote (STV). The multiple-round election (runoff voting) method most commonly uses the FPTP voting method in the second round. The first round, usually held according to SNTV rules, determines which candidates may progress to the second and final round. As usually only two candidates are in the second round, one or the other takes a majority of the votes. Thus, it is truly majoritarian.