One-party state

As of 2023 the following countries are legally constituted as one-party states:

Country	Head of party	Leader title	Party	Ideology	Date of establishment	Duration	Notes
China[4]	Xi Jinping	General Secretary	Chinese Communist Party	Socialism with Chinese characteristics	1 October 1949	74 years, 24 days
Cuba[5]	Miguel Díaz-Canel	First Secretary	Communist Party of Cuba	Marxism–Leninism, Castroism, Guevarism, Left-wing nationalism	16 April 1961	62 years, 192 days
Eritrea[6]	Isaias Afwerki	Chairperson	People's Front for Democracy and Justice	Eritrean nationalism, Statism	24 May 1993	30 years, 154 days
Laos[7]	Thongloun Sisoulith	General Secretary	Lao People's Revolutionary Party	Kaysone Phomvihane Thought	2 December 1975	47 years, 327 days
North Korea[8]	Kim Jong-un	General Secretary	Workers' Party of Korea	Kimilsungism–Kimjongilism	10 October 1945	78 years, 15 days	Leads the Democratic Front for the Reunification of Korea
Sahrawi Arab Democratic Republic	Brahim Ghali	Secretary General	Polisario Front	Sahrawi nationalism, Social democracy	27 February 1976	47 years, 240 days	Non-member state of the United Nations, headquartered in Algeria
Vietnam[9]	Nguyễn Phú Trọng	General Secretary	Communist Party of Vietnam	Ho Chi Minh Thought	2 July 1976	47 years, 115 days

One-party states justify themselves through various methods. Most often, proponents of a one-party state argue that the existence of separate parties runs counter to national unity. Others argue that the one party is the vanguard of the people, being its most politically aware members, and therefore the party's right to rule cannot be legitimately questioned. The Soviet government argued that the existence of multiple political parties would perpetuate class struggle, so only a single party could lead a classless proletariat; it therefore made the Communist Party of the Soviet Union the only authorised political party.

Conversely, Russian historian Vadim Rogovin attributed the establishment of the one-party system to the conditions which were “imposed on Bolshevism by hostile political forces”. Rogovin highlighted the fact that the Bolsheviks made strenuous efforts to preserve the Soviet parties such as the Socialist-Revolutionaries, Mensheviks, and other left parties within the bounds of Soviet legality and their participation in the Soviets on the condition of abandoning armed struggle against the Bolsheviks.[10]

Some one-party states only outlaw opposition parties, while allowing allied parties to exist as part of a permanent coalition (such as a popular front). However, these allied parties are largely or completely subservient to the ruling party and must accept the ruling party's monopoly of power as a condition of their existence. Examples of this are the National Front in former East Germany and the Democratic Front for the Reunification of Korea in North Korea. Other states outlaw all other parties yet allow non-party members to run for legislative seats as independents, as was the case with Taiwan's Tangwai movement in the 1970s and 1980s, as well as the elections in the former Soviet Union. Still others have only a single legal party, membership of which is a prerequisite for holding public office, such as in Turkmenistan under the rule of Saparmurat Niyazov or Zaire under Mobutu Sese Seko.

Within their own countries, dominant parties ruling over one-party states are often referred to simply as the Party. For example, in reference to the Soviet Union, the Party meant the Communist Party of the Soviet Union; in reference to the pre-1991 Republic of Zambia, it referred to the United National Independence Party.

Most one-party states have been ruled by one of the following:

1. A party which supports the ideology of Marxism–Leninism and vanguardism (sometimes described as "communist states", such as the Soviet Union)
2. A party which supports a nationalist or fascist ideology (such as the Kingdom of Italy under the National Fascist Party or Germany under the Nazi Party)
3. A party that came to power in the wake of independence from colonial rule. One-party systems often arise from decolonization because a single party gains an overwhelmingly dominant role in liberation or in independence struggles.

With such a small winning coalition, leaders in One-Party states lack the incentive to care about the well-being of citizens.[11]  Rather, they give out private goods to fellow elites to ensure continued support.  One-Party, compared to Dominant-party dictatorships, structure themselves unlike democracies.  They also turn into democracies at a lower rate than Dominant-party dictatorships.[12] While One-Party states prohibit opposition parties, some allow for elections at the smallest local level. One-Party states lack any legitimate competition. Therefore, they place elites and sympathetic candidates in key administrative races.[13]  For example, The Chinese Communist Party exercises political control by infiltrating village administrations.[14]  They view these positions as crucial for gathering information on the population and maintaining a presence in the far reaches of their borders.[15]  One-Party states recognize the trade-off between election victory and gathering valuable data.[16]  To account for this, the regimes have been observed placing local nobility in easy to win races.[17]  One-Party states have also been observed using elections to ensure that only the most popular elites get chosen to office.[18]  They also gather data from elections to indicate if a local official is performing poorly in the eyes of the residents.[18]  This gives locals the opportunity to monitor local officials and communicate satisfaction with the local government.[18]   Throughout the country, members of the one party hold key political positions.[12]  In doing so, the party avoids committing outright fraud and rather sustains their power at the local level with strategic appointment of elites.[15]  It is also worth noting that it is difficult to gather clear data on these regimes, given their private nature.[13] 

One-party states are usually considered to be authoritarian,[19] to the extent that they are occasionally totalitarian. On the other hand, not all authoritarian or totalitarian states operate upon one-party rule. Some, especially amongst absolute monarchies and military dictatorships, have no need for a ruling party, and therefore make all political parties illegal.

A de facto one-party system is one that, while not officially linking a single political party to governmental power, utilizes some means of political manipulation to ensure only one party stays in power.[20] Many different countries have been claimed to be de facto one-party states, with differing levels of agreement between scholars, although most agree that the African continent is marked by this political system.[21][22] Below are just a few examples of governments that have been claimed to have single party rule due to political manipulation.

Country	Party	Date of establishment	Information
Angola	People's Movement for the Liberation of Angola	11 November 1975	The MPLA has ruled Angola since its declaration of independence from Portugal, starting as a de jure one-party state, and declaring multipartyism in 1991
Republic of the Congo	Congolese Party of Labour	31 December 1968	The People's Republic of the Congo was a one-party state, until the establishment of multipartyism in 1990 and the subsequent loss of the PCT, leading to a civil war in 1997, from which point the PCT has been the sole ruling party since.
Equatorial Guinea	Democratic Party of Equatorial Guinea	11 October 1987	Despite not having any constitutional relation between the government and the PDGE, there is a link between the 1982 constitution and Theodoro Obiang, leader of the PDGE, leading Equatorial Guinea since 1979, and having won every election by at least 92% approval, with all "opposition" parties adamantly supporting Obiang, and never holding more than 32% of seats in any house.
Singapore	People's Action Party	30 May 1959	The PAP is currently the longest ruling party in the world. While it does not have much electoral controversy, the PAP is essentially linked to governance in Singapore.
Japan	Liberal Democratic Party	15 November 1955	After the signing of the Treaty of San Francisco, the estranged right wing parties began gaining power, and with incentives from the CIA,[23] they formed the LDP, counteracting the formation of the JSP, establishing the 1955 System (also known as the One and a Half Party System), in which the LDP has ruled in all but 4 years.
Mexico	Institutional Revolutionary Party	4 March 1929	While not continually in power, the PRI has allegedly bought votes and actively disrupted opposition parties in order to stay in power. The PRI held uninterrupted power for 71 years, from 1929 to 2000, but its power has since dwindled and the de facto one-party system in Mexico disappeared.
Russia	Unity (1999-2001) and United Russia (2001-)	Between 2000 and 2005	After the formation of the Russian Federation, the CPRF quickly became the dominant party in the State Duma and Federation Council. The party slowly lost their power through the 1990s with the growing power of smaller conservative powers, developing into Russian parties of power, being directly associated with the concept of governance through Russian oligarchism. United Russia, led by former president Dmitry Medvedev, is not affiliated directly with Vladimir Putin (who serves as an independent), but directly supports him through the All-Russia People's Front, holding a good majority in the State Duma and the Federation Council since 2003.
Rwanda	Rwandan Patriotic Front	In power since 1994	Although Rwanda is nominally democratic, elections are manipulated in various ways, which include banning opposition parties, arresting or assassinating critics, and electoral fraud.[24][25]

• Ban on factions in the Communist Party of the Soviet Union
• Political organisation
• Dominant-party system
• Political factionalism
• Outline of democracy
• Multi-party system
• Two-party system
• List of political party songs

• Angiolillo, Fabio (2023). "Introducing the One-Party Membership Dataset: A dataset on party membership in autocracies". Journal of Peace Research