1905–1922 Sinn Féin was founded on 28 November 1905, when, at the first annual Convention of the National Council,
Arthur Griffith outlined the Sinn Féin policy, "to establish in Ireland's capital a national legislature endowed with the moral authority of the Irish nation". The party supported the
Irish Republican Army during the
War of Independence, and members of the Dáil government negotiated the
Anglo-Irish Treaty with the British government in 1921. In the Dáil debates that followed, the party divided on the Treaty. The pro-Treaty and anti-Treaty components (led by
Michael Collins and
Éamon de Valera respectively) managed to agree on a "Coalition Panel" of Sinn Féin candidates to stand in the
1922 general election. After the election, anti-Treaty members walked out of the Dáil, and pro- and anti-Treaty members took opposite sides in the ensuing
Civil War.
1923–1970 Pro-Treaty Dáil deputies and other Treaty supporters formed a new party,
Cumann na nGaedheal, on 27 April 1923 at a meeting in Dublin, where delegates agreed on a constitution and political programme. Cumann na nGaedheal went on to govern the new
Irish Free State for nine years (it merged with two other organisations to form
Fine Gael in 1933). Anti-Treaty Sinn Féin members continued to boycott the Dáil. At a special
Ard Fheis in March 1926, de Valera proposed that elected members be allowed to take their seats in the Dáil if and when the controversial
Oath of Allegiance was removed. When his motion was defeated, de Valera resigned from Sinn Féin; on 16 May 1926, he founded his own party,
Fianna Fáil, which was dedicated to republicanising the Free State from within its political structures. He took most Sinn Féin
Teachtaí Dála (TDs) with him. De Valera's resignation meant also the loss of financial support from America. The rump Sinn Féin party could field no more than fifteen candidates, and won only five seats in the
June 1927 general election, a decline in support not seen since before 1916. Vice-president and leader
Mary MacSwiney announced that the party simply did not have the funds to contest
the second election called that year, declaring "no true Irish citizen can vote for any of the other parties". At the
1955 United Kingdom general election, two Sinn Féin candidates were elected to Westminster, and likewise, four members of Sinn Féin were elected to Leinster House in the
1957 Irish general election. In December 1956, at the beginning of the IRA's
Border Campaign (Operation Harvest), the Northern Ireland Government banned Sinn Féin under the
Special Powers Act; it would remain banned until 1974. By the end of the Border campaign five years later, the party had once again lost all national representation. Through the 1960s, some leading figures in the movement, such as
Cathal Goulding,
Seán Garland,
Billy McMillen and
Tomás Mac Giolla, moved steadily to the left, even to
Marxism, as a result of their own reading and thinking and contacts with the Irish and international left. This angered more traditional republicans, who wanted to stick to the national question and armed struggle. The Garland Commission was set up in 1967, to investigate the possibility of ending abstentionism. Its report angered the already disaffected traditional republican element within the party, notably
Seán Mac Stíofáin and Ruairí Ó Brádaigh, who viewed such a policy as treason against the Irish Republic.
1970–1975 (pictured in 2004) was the president of Provisional Sinn Féin from 1970 until 1983. Sinn Féin split in two at the beginning of 1970. On 11 January, the proposal to end abstentionism and take seats, if elected, in the Dáil, the
Parliament of Northern Ireland and the Parliament of the United Kingdom was put before the members at the party's
Ard Fheis. A similar motion had been adopted at an IRA convention the previous month, leading to the formation of a Provisional Army Council by Mac Stíofáin and other members opposed to the leadership. When the motion was put to the
Ard Fheis, it failed to achieve the necessary two-thirds majority. The Executive attempted to circumvent this by introducing a motion in support of IRA policy, at which point the dissenting delegates walked out of the meeting. These members reconvened at Kevin Barry Hall in
Parnell Square, where they appointed a Caretaker Executive with Ruairí Ó Brádaigh as chairman. The Caretaker Executive's first act was to pass a
resolution pledging allegiance to the 32-county Irish Republic and the Provisional Army Council. It also declared itself opposed to the ending of abstentionism, the drift towards "extreme forms of socialism", the failure of the leadership to defend the nationalist people of Belfast during the
1969 Northern Ireland riots, and the expulsion of traditional republicans by the leadership during the 1960s. At its October 1970
Ard Fheis, delegates were informed that an IRA convention had been held and had regularised its structure, bringing to an end the "provisional" period. By then, however, the label "Provisional" or "Provo" was already being applied to them by the media. The opposing, anti-abstentionist party became known as "Official Sinn Féin". It changed its name in 1977 to "Sinn Féin—The Workers' Party", and in 1982 to "
The Workers' Party". Because the "Provisionals" were committed to military rather than political action, Sinn Féin's initial membership was largely confined, in
Danny Morrison's words, to men "over military age or women". A Sinn Féin organiser of the time in
Belfast described the party's role as "agitation and publicity". New
cumainn (branches) were established in Belfast, and a new newspaper,
Republican News, was published. Sinn Féin took off as a protest movement after the introduction of
internment in August 1971, organising marches and pickets. The party launched its platform,
Éire Nua ("a New Ireland") at the 1971
Ard Fheis. In general, however, the party lacked a distinct political philosophy. In the words of Brian Feeney, "Ó Brádaigh would use Sinn Féin
ard fheiseanna (party conferences) to announce republican policy, which was, in effect, IRA policy, namely that Britain should leave the North or the 'war' would continue". In May 1974, a few months after the
Sunningdale Agreement, the ban on Sinn Féin was lifted by the UK
Secretary of State for Northern Ireland. Sinn Féin was given a concrete presence in the community when the
IRA declared a ceasefire in 1975. 'Incident centres', manned by Sinn Féin members, were set up to communicate potential confrontations to the British authorities. From 1976, there was a broadcasting ban on Sinn Féin representatives in the Republic of Ireland, after the
Minister for Posts and Telegraphs,
Conor Cruise O'Brien, amended
Section 31 of the Broadcasting Act. This prevented
RTÉ interviewing Sinn Féin spokespersons under any circumstances, even where the subject was not related to the Northern Ireland conflict. This lasted until 1994.
1976–1983 Political status for prisoners became an issue after the ending of the truce. Rees released the last of the internees, and ended '
Special Category Status' for all prisoners convicted after 1 March 1976. This led first to the
blanket protest, and then to the
dirty protest. Around the same time,
Gerry Adams began writing for
Republican News, calling for Sinn Féin to become more involved politically. Over the next few years, Adams and those aligned with him would extend their influence throughout the republican movement and slowly marginalise Ó Brádaigh, part of a general trend of power in both Sinn Féin and the IRA shifting north. In particular, Ó Brádaigh's part in the 1975 IRA ceasefire had damaged his reputation in the eyes of northern republicans. The prisoners' protest climaxed with the
1981 hunger strike, during which striker
Bobby Sands was elected Member of Parliament for
Fermanagh and South Tyrone as an
Anti H-Block candidate. After his death on hunger strike, his seat was held, with an increased vote, by his election agent,
Owen Carron. Two other Anti H-Block candidates were elected to
Dáil Éireann in the
general election in the Republic. These successes convinced republicans that they should contest every election. Danny Morrison expressed the mood at the 1981
Ard Fheis when he said: This was the origin of what became known as the
Armalite and ballot box strategy. Ó Brádaigh's chief policy, a plan for a federalised Irish state dubbed
Éire Nua, was dropped in 1982, and the following year Ó Brádaigh stepped down as president, and was replaced by Adams.
1983–1998 and
Martin McGuinness (pictured 2016), Sinn Féin adopted a reformist policy, eventually leading to the
Good Friday Agreement. Under Adams' leadership electoral politics became increasingly important. In 1983
Alex Maskey was elected to
Belfast City Council, the first Sinn Féin member to sit on that body. Sinn Féin polled over 100,000 votes in the
Westminster elections that year, and Adams won the
West Belfast seat that had been held by the
Social Democratic and Labour Party (SDLP).
By 1985 it had 59 seats on seventeen of the 26 Northern Ireland councils, including seven on Belfast City Council. The party began a reappraisal of the policy of abstention from the Dáil. At the 1983
Ard Fheis the constitution was amended to remove the ban on the discussion of abstentionism to allow Sinn Féin to run a candidate in the forthcoming European elections. However, in his address, Adams said, "We are an abstentionist party. It is not my intention to advocate change in this situation." A motion to permit entry into the Dáil was allowed at the 1985
Ard Fheis, but did not have the active support of the leadership, and it failed narrowly. By October of the following year an IRA Convention had indicated its support for elected Sinn Féin TDs taking their seats. Thus, when the motion to end abstention was put to the
Ard Fheis on 1 November 1986, it was clear that there would not be a split in the IRA as there had been in 1970. The motion was passed with a two-thirds majority. Ó Brádaigh and about twenty other delegates walked out, and met in a Dublin hotel with hundreds of supporters to re-organise as
Republican Sinn Féin. In October 1988, the British Conservative government followed the Republic in banning broadcasts of Sinn Féin representatives. Prime Minister
Margaret Thatcher said it would "deny terrorists the oxygen of publicity". Broadcasters quickly found ways around the ban, mainly by using actors to dub the voices of banned speakers. The legislation did not apply during election campaigns and under certain other circumstances. The ban lasted until 1994. Tentative negotiations between Sinn Féin and the British government led to more substantive discussions with the SDLP in the 1990s. Multi-party negotiations began in 1994 in Northern Ireland, without Sinn Féin. The Provisional IRA declared a ceasefire in August 1994. Sinn Féin then joined the talks, but the
Conservative government under
John Major soon came to depend on unionist votes to remain in power. It suspended Sinn Féin from the talks, and began to insist that the IRA decommission all of their weapons before Sinn Féin be re-admitted to the talks; this led to the IRA calling off its ceasefire. The new
Labour government of
Tony Blair was not reliant on unionist votes and re-admitted Sinn Féin, leading to another, permanent, ceasefire. The talks led to the
Good Friday Agreement of 10 April 1998, which set up an inclusive devolved government in Northern Ireland, and altered the Dublin government's constitutional claim to the whole island in
Articles 2 and 3 of the Constitution of Ireland. Republicans opposed to the direction taken by Sinn Féin in the peace process formed the
32 County Sovereignty Movement in the late 1990s.
1998–2017 to the Dáil in 1997 was the first time in 75 years a Sinn Féin TD had taken their seat and marked a turning point in the party's history At the
1997 Irish general election,
Caoimhghín Ó Caoláin was elected to the Dáil. In doing so, he became the first person under the "Sinn Féin" banner to be elected to Leinster House since
1957, and the first since 1922 to take their seat. Ó Caoláin's entry to the Dáil marked the beginning of a continuous Sinn Féin presence in the Republic of Ireland's national political bodies. The party expelled
Denis Donaldson, a party official, in December 2005, with him stating publicly that he had been in the employ of the British government as an agent since the 1980s. Donaldson told reporters that the British security agencies who employed him were behind the collapse of the Assembly and set up Sinn Féin to take the blame for it, a claim disputed by the British government. Donaldson was found fatally shot in his home in
County Donegal on 4 April 2006, and a murder inquiry was launched. In April 2009, the
Real IRA released a statement taking responsibility for the killing. When Sinn Féin and the Democratic Unionist Party (DUP) became the largest parties, by the terms of the Good Friday Agreement no deal could be made without the support of both parties. They nearly reached a deal in November 2004, but the DUP insisted on photographic or video evidence that
decommissioning of IRA weapons had been carried out, which was unacceptable to Sinn Féin. In April 2006, a number of members of Sinn Féin who believed the party was not committed enough to socialism split from the party and formed a new group called
Éirígí, which later became a (minor) political party in its own right. On 2 September 2006, Martin McGuinness publicly stated that Sinn Féin would refuse to participate in a shadow assembly at Stormont, asserting that his party would only take part in negotiations that were aimed at restoring a power-sharing government. This development followed a decision on the part of members of Sinn Féin to refrain from participating in debates since the Assembly's recall the previous May. The relevant parties to these talks were given a deadline of 24 November 2006 to decide upon whether or not they would ultimately form the executive. The 86-year Sinn Féin boycott of policing in Northern Ireland ended on 28 January 2007, when the
Ard Fheis voted overwhelmingly to support the
Police Service of Northern Ireland (PSNI). Sinn Féin members began to sit on Policing Boards and join District Policing Partnerships. There was opposition to this decision within Sinn Féin, and some members left, including elected representatives. The most well-known opponent was former IRA prisoner
Gerry McGeough, who stood in the
2007 Assembly election against Sinn Féin in the constituency of
Fermanagh and South Tyrone, as an Independent Republican. He polled 1.8% of the vote. Others who opposed this development left to found the
Republican Network for Unity. Sinn Féin supported a no vote in the referendum on the
Twenty-eighth Amendment of the Constitution Bill 2008. Immediately after the
June 2017 UK general election, where the Conservatives won 49% of seats but not an overall majority, so that non-mainstream parties could have significant influence, Gerry Adams announced for Sinn Féin that their elected MPs would continue the policy of not swearing
allegiance to the Queen, as would be required for them to take their seats in the Westminster Parliament. In 2017 and 2018, there were allegations of bullying within the party, leading to a number of resignations and expulsions of elected members. At the
Ard Fheis on 18 November 2017, Gerry Adams announced he would stand down as president of Sinn Féin in 2018, and would not stand for re-election as TD for
Louth.
2018–present and
Michelle O'Neill in February 2018 On 10 February 2018,
Mary Lou McDonald was announced as the new president of Sinn Féin at a special Ard Fheis in Dublin.
Michelle O'Neill was also elected as vice president of the party. a stance later reiterated by McDonald as a way of resolving the
border issues raised by Brexit. Sinn Féin's first elections under McDonald resulted in the party performing well under its own expectations during the
2018 Irish presidential election that October, and similarly, the party's performance was labelled "disastrous" during the concurrent May
2019 European Parliament election in Ireland and
2019 Irish local elections. In the European elections, Sinn Féin lost 2 MEPs and dropped their vote share by 7.8%, while in the local elections the party lost 78 (almost half) of their local councillors and dropped their vote share by 5.7%. McDonald stated "It was a really bad day out for us. But sometimes that happens in politics, and it's a test for you. I mean it's a test for me personally, obviously, as the leader". However, in the
2020 Irish general election, Sinn Féin received the greatest number of first preference votes nationally, making it the best result for any incarnation of Sinn Féin since
the 1922 election.
Fianna Fáil,
Fine Gael and the
Green Party formed a coalition government in June 2020. Although second on seats won at the election, Sinn Féin became the largest party in the Dáil when
Marc MacSharry resigned from
Fianna Fáil in September 2021, which, with
Seán Ó Fearghaíl sitting as
Ceann Comhairle, left Sinn Féin the largest party by one seat. Sinn Féin lost their numerical advantage in February 2022 following the resignation of
Violet-Anne Wynne. In November 2020, the national chairman of Sinn Féin
Declan Kearney contacted several dissident republican political parties such as
Saoradh,
Republican Network for Unity and the
Irish Republican Socialist Party about creating a united republican campaign to call for a referendum on Irish unification. This information did not become publicly known until 2022 and the move was criticised in some quarters on the basis that it would be wrong for Sinn Féin to work with dissident republican groups which do not repudiate violence by paramilitaries. Sinn Féin retorted that engaging with dissident republicans draws them into the democratic process and political solutions instead of violent ones. Sinn Féin won 29% of the
first-preference votes in the
2022 Northern Ireland Assembly election, the highest share of any party. With 27 out of 90 seats, they became the largest party in Stormont for the first time ever. "Today ushers in a new era", O'Neill said shortly before the final results were announced. "Irrespective of religious, political or social backgrounds, my commitment is to make politics work." Following the
2023 Northern Ireland local elections, Sinn Féin became the largest party in local government for the first time. Then, in the local elections in the Republic of Ireland
in 2024, Sinn Féin increased their vote share, however, significantly fell short of the polls, showcasing a divide between the party's leadership and grassroots over immigration, with disgruntled Sinn Féin voters voting instead for small right-wing parties. However, following the
2024 United Kingdom general election, Sinn Féin became the single largest party representing Northern Ireland in Westminster. == Past links with Republican paramilitaries ==