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This lesson examines the different party systems that can exist in a democracy and evaluates which model best describes the UK.
A party system describes the pattern of party competition within a political system — how many parties are significant, how they interact, and whether power alternates between them.
In a one-party system, only one political party is legally permitted to hold power. Opposition parties are banned or suppressed.
| Feature | Detail |
|---|---|
| Examples | China (CCP), North Korea (Workers' Party), Cuba (Communist Party) |
| Democratic? | No — citizens have no genuine electoral choice |
| Characteristics | No free elections; no opposition; party and state are fused |
In a two-party system, two major parties dominate the political landscape, regularly alternating in government. Other parties exist but have little realistic chance of winning power.
| Feature | Detail |
|---|---|
| Classic example | The USA (Democrats vs. Republicans) |
| UK relevance | The UK was considered a two-party system for much of the post-war period (Labour vs. Conservative) |
| Characteristics | Two parties win the vast majority of seats; clear alternation of government; third parties are marginalised |
Arguments that the UK is still a two-party system:
Arguments that the UK is no longer a two-party system:
In a multi-party system, three or more parties regularly win significant shares of the vote and seats, and coalition or minority governments are common.
| Feature | Detail |
|---|---|
| Examples | Germany, the Netherlands, Italy, Israel |
| Characteristics | Proportional representation used; coalition governments; power shared between parties |
| UK relevance | Some argue the UK is moving towards a multi-party system, especially at devolved level |
In a dominant-party system, one party consistently wins elections over a prolonged period, even though opposition parties are free to compete.
| Feature | Detail |
|---|---|
| Examples | Japan (LDP), Sweden (Social Democrats for much of the 20th century), Singapore (PAP) |
| UK relevance | Some argue the Conservatives were a dominant party from 2010 to 2024 (four consecutive election wins) |
| Characteristics | One party dominates but opposition exists and elections are free |
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