First-Past-the-Post

The Winner Takes All

First-past-the-post (FPTP) is the simplest electoral system: voters cast one vote for one candidate, and the candidate with the most votes wins the seat. No majority is required. A candidate can win with 30 percent of the vote if no other candidate gets more. The system is used in the United Kingdom, the United States, Canada, India, and many former British colonies.

FPTP's simplicity is its greatest strength. Voters understand it immediately, counting is straightforward, and results are usually known quickly. Each district has a clear representative, creating a direct link between constituents and their elected official. Supporters argue this accountability is essential for responsive democracy, and that FPTP tends to manufacture stable single-party majorities that can govern without fragile coalitions.

A Worked Example: Splitting the Vote

Imagine a single district with 100,000 voters and four candidates:

Ada wins the single seat with just 31 percent of the vote, even though 69 percent of voters preferred someone else. The 69,000 votes cast for Ben, Cara, and Dan elect nobody. Notice too how a similar candidate can change everything: if Cara had not run, most of her 22,000 voters might have switched to Ben, who would then have overtaken Ada. This is how FPTP can turn a divided majority into a minority victory, and why the entry or exit of one candidate can flip a result.

The Distortions

FPTP produces systematic distortions. Wasted votes are the most significant: every vote for a losing candidate, and every vote beyond what the winner needed, has no effect on the outcome. In a typical FPTP election, 40-60 percent of all votes cast are wasted. This means large swathes of the electorate have no representation.

The system also enables 'wrong winner' elections where a party wins more seats despite winning fewer total votes. This happened in the UK in 1951 (Labour won more votes, Conservatives won more seats) and in the US in 2000 and 2016 (Democratic candidates won more popular votes, Republican candidates won the presidency). The geographic distribution of support matters as much as its total size.

These distortions are compounded by 'safe seats' — constituencies where the same party wins every election. In the UK, roughly two-thirds of seats have not changed hands in decades, so general elections are effectively decided by voters in a small number of competitive 'marginal' constituencies, while most voters' choices are predetermined by geography.

Strategic Voting and Spoilers

Because only one candidate can win each seat, voters face strong incentives to vote strategically rather than sincerely. A voter who prefers a third-party candidate may vote for a less-preferred major-party candidate to avoid 'wasting' their vote. This strategic dynamic suppresses support for smaller parties and helps explain why FPTP countries tend toward two-party systems, a regularity so consistent that political scientists call it Duverger's law.

The 'spoiler effect' compounds this problem. In the 2000 US presidential election, Ralph Nader won 97,488 votes in Florida as a Green Party candidate. Al Gore lost Florida (and the presidency) by 537 votes. Whether Nader 'spoiled' Gore's victory is debated, but the dynamic illustrates how FPTP can punish voters whose genuine preferences fall outside the two major parties.