2.4.1

Different Party Systems

Test yourself

Dominant- and Single-Party Systems

There are five main types of party systems: the dominant-party system, two-party system, single-party system, two-and-a-half party system and multi-party system.

Illustrative background for Dominant-party systemIllustrative background for Dominant-party system ?? "content

Dominant-party system

  • A dominant-party system is where only one party has a realistic chance of winning political power even though a number of parties stand in the election.
  • This could be because of electoral fraud, exploitation of state resources or genuine popularity.
    • The African National Congress in South Africa has won every election since 1994, so could be seen as a dominant party.
    • In Japan, the Liberal-Democratic Party has been in power almost continually since 1955.
Illustrative background for Single-party systemIllustrative background for Single-party system ?? "content

Single-party system

  • A single-party system (or one-party state) is a system in which only one party exists and all other parties banned.
  • The single party which dominates has complete control over the election and often exists in political systems in which one person rules.
    • The Democratic People’s Republic of Korea (North Korea) operates in a single-party system.
    • The Lao People's Revolutionary Party in Laos is the only legal political party.

Two-, Two-and-a-Half, and Multi-Party Systems

There are five main types of party systems: the dominant-party system, two-party system, single-party system, two-and-a-half party system and multi-party system.

Illustrative background for Two-party systemsIllustrative background for Two-party systems ?? "content

Two-party systems

  • A two-party system is where only two political parties have a chance of success at an election and so power shifts between those two parties.
  • The First Past the Post electoral voting system is more likely to result in a two-party system
Illustrative background for Examples of two-party systemsIllustrative background for Examples of two-party systems ?? "content

Examples of two-party systems

  • Conservatives and Labour have won every UK general election in recent years.
  • The United States of America has a two-party system in which either the Republicans or Democrats win the presidential election.
Illustrative background for Two-and-a-half-party systemsIllustrative background for Two-and-a-half-party systems ?? "content

Two-and-a-half-party systems

  • Two main parties exist in the party system, but a third, smaller party challenges the dominance of the two main parties.
  • In the 2010-2015 coalition government, the Liberal Democrats could be argued to be the half-party.
    • They didn't achieve enough votes to form a majority but could support the Conservatives in a coalition.
Illustrative background for Multi-party systemsIllustrative background for Multi-party systems ?? "content

Multi-party systems

  • A multi-party system is where more than two parties have the possibility of winning an election or of being able to take up a role in power as part of a governing coalition.
  • The government in a multi-party system will often be a coalition made up of a number of political parties.
  • A multi-party system often is the result of a proportional representation voting system.
Illustrative background for Examples of multi-party systemsIllustrative background for Examples of multi-party systems ?? "content

Examples of multi-party systems

  • Germany is an example of a multi-party system, where coalitions are formed to govern the country.
  • In 2018 the Christian Democratic Union/Christian Social Union formed a coalition agreement with the Social Democratic Party following the 2017 national election.

What is the UK's Party System?

The UK has traditionally had a two-party system, but the rise of other parties has led to a case being made that the UK is moving closer to that of a multi-party system.

Illustrative background for Dominant party systemIllustrative background for Dominant party system ?? "content

Dominant party system

  • It could be argued that the UK reflected a dominant-party system under the Conservatives from 1979-1997 and under Labour from 1997-2010.
Illustrative background for Two-party systemIllustrative background for Two-party system ?? "content

Two-party system

  • Only Labour and the Conservatives have a chance of forming a government or being the leading partner within a coalition because of their extensive support.
    • They still take a large % of the popular vote in elections.
    • Party membership is still the highest.
  • Minor parties in UK politics have not been able to maintain much popularity and support, and their success rarely lasts.
    • UKIP’s support has collapsed.
    • The Green Party’s support has declined, and they have failed to add to their 1 MP as of 2017.
Illustrative background for Two-and-a-half-party systemIllustrative background for Two-and-a-half-party system ?? "content

Two-and-a-half-party system

  • The 2010-2015 could be argued to be a two-and-a-half-party system, with the Liberal Democrats the 'half' party.
  • While the Conservatives had a majority in 2015, they lost it after the 2017 snap election.
  • The need to rely on a third party to support the government suggests that the UK may have a two-and-a-half-party system.
  • But, in the 2015 general election the Lib Dems lost 49 seats, making their presence in parliament much smaller.
Illustrative background for Multiparty systemIllustrative background for Multiparty system ?? "content

Multiparty system

  • There has been support at general elections for minority parties in recent years and a number of parties are seen as important political players.
  • In other national assembly elections, minority parties have had success in elections that don't use First Past the Post.
    • Other voting systems (such as Alternative Vote) can help elect parties with a more thinly spread support.
  • But, the percentage vote share for minor parties fell in 2017.

Jump to other topics

1Democracy & Participation

2Political Parties

3Electoral Systems

4Voting Behaviour & the Media

5Conservatism

6Liberalism

7Socialism

8The UK Constitution

9The UK Parliament

10The Prime Minister & the Executive

11Relationships Between Government Branches

12US Constitution & Federalism

13US Congress

14US Presidency

15US Supreme Court & Civil Rights

16US Democracy & Participation

17Comparing Democracies

18Feminism

19Nationalism

Go student ad image

Unlock your full potential with GoStudent tutoring

  • Affordable 1:1 tutoring from the comfort of your home

  • Tutors are matched to your specific learning needs

  • 30+ school subjects covered

Book a free trial lesson