Ruairí Ó Brádaigh, Irish republican political and military leader, is born Peter Roger Casement Brady on October 2, 1932, in Longford, County Longford. He is Chief of Staff of the Irish Republican Army (IRA) from 1958 to 1959 and again from 1960 to 1962, president of Sinn Féin from 1970 to 1983, and president of Republican Sinn Féin from 1987 to 2009.

Ó Brádaigh is born into a middle-class republican family. His father, Matt Brady, is an IRA volunteer who is severely wounded in an encounter with the Royal Irish Constabulary (RIC) in 1919. His mother, May Caffrey, is a Cumann na mBan volunteer and a 1922 graduate of University College Dublin (UCD). His father dies when he is ten and is given a paramilitary funeral led by his former IRA colleagues. His mother, prominent as the Secretary for the County Longford Board of Health, lives until 1974. He is educated at Melview National School at primary level and attends secondary school at St. Mel’s College, leaving in 1950, and graduates from University College Dublin in 1954. That year he takes a job teaching Irish language at Roscommon Vocational School in Roscommon. He is a deeply religious Catholic who refrains from smoking or drinking.

Ó Brádaigh joins Sinn Féin in 1950. While at university, in 1951, he joins the Irish Republican Army. In September 1951, he marches with the IRA at the unveiling of the Seán Russell monument in Fairview Park, Dublin. A teacher by profession, he is also a Training Officer for the IRA. In 1954, he is appointed to the Military Council of the IRA, a subcommittee set up by the IRA Army Council in 1950 to plan a military campaign against Royal Ulster Constabulary (RUC) barracks in Northern Ireland.

On August 13, 1955, Ó Brádaigh leads a ten-member IRA group in an arms raid on Hazebrouck Barracks, near Arborfield, Berkshire, England, a depot for the No. 5 Radar Training Battalion of the Royal Electrical and Mechanical Engineers. It is the biggest IRA arms raid in Britain. Most, if not all, of the weapons are recovered in a relatively short period of time. A van, traveling too fast, is stopped by the police and IRA personnel are arrested. Careful police work leads to weapons that had been transported in a second van and stored in London.

The IRA Border Campaign commences on December 12, 1956. As an IRA General Headquarters Staff (GHQ) officer, Ó Brádaigh is responsible for training the Teeling Column in the west of Ireland. During the Campaign, he serves as second-in-command of the Teeling Column. On December 30, 1956, he partakes in the Teeling Column attack on RUC barracks in Derrylin, County Fermanagh. RUC Constable John Scally is killed in the attack and is the first fatality of the new IRA campaign. Ó Brádaigh and others are arrested by the Garda Síochána across the border in County Cavan the day after the attack. They are tried and jailed for six months in Mountjoy Prison. A leading abstentionist, upon his arrest he refuses to recognize the authority of the Irish government and refuses to renounce violence in exchange for his release.

Although a prisoner, Ó Brádaigh is elected a Sinn Féin Teachta Dála (TD) for the Longford–Westmeath constituency at the 1957 Irish general election. Running on an abstentionist ticket, Sinn Féin wins four seats which go to Ó Brádaigh, Eighneachán Ó hAnnluain, John Joe McGirl and John Joe Rice. They refuse to recognise the authority of Dáil Éireann and state they will only take a seat in an all-Ireland parliament. He does not retain his seat at the 1961 Irish general election.

Upon completing his prison sentence, Ó Brádaigh is immediately interned at the Curragh Camp along with other republicans. On September 27, 1958, he escapes from the camp along with Dáithí Ó Conaill. While a football match is in progress, the pair cuts through a wire fence and escapes from the camp under a camouflage grass blanket. This is an official escape, authorised by the officer commanding (OC) of the IRA internees, Tomás Óg Mac Curtain. He is the first Sinn Féin TD on the run since the 1920s.

In October 1958, Ó Brádaigh becomes the IRA Chief of Staff, a position he holds until May 1959, when Seán Cronin is elected as his replacement. He is arrested in November 1959, refuses to answer questions, and is jailed in Mountjoy Prison under the Offences against the State Act. He is released in May 1960 and, after Cronin is arrested, again becomes Chief of Staff. Although he always emphasises that it is a collective declaration, he is the primary author of the statement ending the IRA Border Campaign in 1962. At the IRA 1962 Convention he indicates that he is not interested in continuing as Chief of Staff.

After Ó Brádaigh’s arrest in December 1956, he takes a leave from teaching at Roscommon Vocational School. He is re-instated and begins teaching again in late 1962, just after he is succeeded by Cathal Goulding in the position of Chief of Staff of the IRA. He remains an active member of Sinn Féin and is also a member of the IRA Army Council throughout the decade.

In the 1966 United Kingdom general election, Ó Brádaigh runs unsuccessfully as an Independent Republican candidate in the Fermanagh and South Tyrone constituency.

Ó Brádaigh opposes the decision of the IRA and Sinn Féin to drop abstentionism and to recognise the Westminster parliament in London, the Stormont parliament in Belfast and the Leinster House parliament in 1969/1970. On January 11, 1970, along with Seán Mac Stíofáin, he leads the walkout from the 1970 Sinn Féin Ard Fheis after the majority votes to end the policy of abstentionism, although the vote to change the Sinn Féin constitution fails to receive the required two-thirds majority. The delegates who walk out reconvene at the Kevin Barry Hall in Parnell Square, Dublin, and establish Provisional Sinn Féin.

Ó Brádaigh is voted chairman of the Caretaker Executive of Provisional Sinn Féin. That October, he formally becomes president of the party. He holds this position until 1983. In his presidential address to the 1971 Provisional Sinn Féin Ard Fheis, he says that the first step to achieving a United Ireland is to make Northern Ireland ungovernable. He apparently also serves on the Army Council or the executive of the Provisional Irish Republican Army until he is seriously injured in a car accident on January 1, 1984.

On May 31, 1972, Ó Brádaigh is arrested under the Offences Against the State Act and immediately commences a hunger strike. A fortnight later the charges against him are dropped and he is released. With Dáithí Ó Conaill he develops the Éire Nua policy, which is launched on June 28, 1972. The policy calls for a federal Ireland.

On December 3, 1972, Ó Brádaigh appears on the London Weekend Television Weekend World programme. He is arrested by the Gardaí again on December 29, 1972, and charged in the newly established Special Criminal Court with Provisional IRA membership. In January 1973 he is the first person convicted under the Offences Against the State (Amendment) Act 1972 and is sentenced to six months in the Curragh Camp.

In 1974, Ó Brádaigh testifies in person before the United States Senate Committee on Foreign Relations regarding the treatment of IRA prisoners in Ireland. He also has a meeting with prominent Irish American congressman Tip O’Neill. The same year, the State Department revokes his multiple entry visa. Federal Bureau of Investigation documents in 1975 describe him as a “national security threat” and a “dedicated revolutionary undeterred by threat or personal risk” and show that the visa ban was requested by the British Foreign Office and supported by the Dublin government.

On December 10, 1974, Ó Brádaigh participates in the Feakle talks between the IRA Army Council and Sinn Féin leadership and the leaders of the Protestant churches in Ireland. Although the meeting is raided and broken up by the Gardaí, the Protestant churchmen pass on proposals from the IRA leadership to the British government. These proposals call on the British government to declare a commitment to withdraw, the election of an all-Ireland assembly to draft a new constitution and an amnesty for political prisoners.

The IRA subsequently calls a “total and complete” ceasefire intended to last from December 22, 1974 to January 2, 1975, to allow the British government to respond to proposals. British government officials also hold talks with Ó Brádaigh in his position as president of Sinn Féin from late December to January 17, 1975.

On February 10, 1975, the IRA Army Council, unanimously endorses an open-ended cessation of IRA “hostilities against Crown forces,” which becomes known as the 1975 truce. The IRA Chief of Staff at the time is Seamus Twomey of Belfast. It is reported in some quarters that the IRA leaders mistakenly believe they had persuaded the British Government to withdraw from Ireland and the protracted negotiations between themselves and British officials are the preamble to a public declaration of intent to withdraw. In fact, as British government papers now show, the British entertain talks with the IRA in the hope that this would fragment the movement further and score several intelligence coups during the talks. This bad faith embitters many in the republican movement, and another ceasefire does not happen until 1994.

In late December 1976, along with Joe Cahill, Ó Brádaigh meets two representatives of the Ulster Loyalist Central Co-ordinating Committee (ULCCC), John McKeague and John McClure, at the request of the latter body. Their purpose is to try to find a way to accommodate the ULCCC proposals for an independent Northern Ireland with the Sinn Féin’s Éire Nua programme. It is agreed that if this can be done, a joint Loyalist-Republican approach can then be made to request the British government to leave Ireland. Desmond Boal QC and Seán MacBride SC are requested and accepted to represent the loyalist and republican positions. For months they have meetings in various places including Paris. The dialogue eventually collapses when Conor Cruise O’Brien, then Minister for Posts and Telegraphs and vociferous opponent of the Provisional IRA, becomes aware of it and condemns it on RTÉ Radio. As the loyalists had insisted on absolute secrecy, they feel unable to continue with the talks as a result.

In the aftermath of the 1975 truce, the Ó Brádaigh/Ó Conaill leadership comes under severe criticism from a younger generation of activists from Northern Ireland, headed by Gerry Adams, who becomes a vice-president of Sinn Féin in 1978. By the early 1980s, Ó Brádaigh’s position as president of Sinn Féin is openly under challenge and the Éire Nua policy is targeted in an effort to oust him. The policy is rejected at the 1981 Sinn Féin Ard Fheis and finally removed from the Sinn Féin constitution at the 1982 Ard Fheis. At the following year’s Ard Fheis, Ó Brádaigh and Ó Conaill resign from their leadership positions, voicing opposition to the dropping of the Éire Nua policy by the party.

On November 2, 1986, the majority of delegates to the Sinn Féin Ard Fheis vote to drop the policy of abstentionism if elected to Dáil Éireann, but not the British House of Commons or the Northern Ireland parliament at Stormont, thus ending the self-imposed ban on Sinn Féin elected representatives from taking seats at Leinster House. Ó Brádaigh and several supporters walk out and immediately assemble at Dublin’s West County Hotel and set up Republican Sinn Féin (RSF). As an ordinary member, he had earlier spoken out against the motion (resolution 162) in an impassioned speech. The Continuity IRA becomes publicly known in 1996. Republican Sinn Féin’s relationship with the Continuity IRA is similar to the relationship between Sinn Féin and the Provisional IRA when Ó Brádaigh was Sinn Féin’s president.

Ó Brádaigh believes RSF to be the sole legitimate continuation of the pre-1986 Sinn Féin, arguing that RSF has kept the original Sinn Féin constitution. RSF readopts and enhances his Éire Nua policy. His party has electoral success in only a few local elections.

Ó Brádaigh remains a vociferous opponent of the Good Friday Agreement, viewing it as a programme to copperfasten Irish partition and entrench sectarian divisions in the north. He condemns his erstwhile comrades in Provisional Sinn Féin and the Provisional IRA for decommissioning weapons while British troops remain in the country. In his opinion, “the Provo sell-out is the worst yet – unprecedented in Irish history.” He condemns the Provisional IRA’s decision to seal off a number of its arms dumps as “an overt act of treachery,” “treachery punishable by death” under IRA General Army Order Number 11.

In July 2005, Ó Brádaigh hands over a portion of his personal political papers detailing discussions between Irish Republican leaders and representatives of the British Government during 1974–1975 to the James Hardiman Library, National University of Ireland, Galway.

In September 2009, Ó Brádaigh announces his retirement as leader of Republican Sinn Féin. His successor is Des Dalton. He is also a long-standing member of the Celtic League, an organization which fosters cooperation between the Celtic people and promotes the culture, identity and eventual self-determination for the people, in the form of six sovereign states, for the Celtic nations – Wales, Cornwall, Brittany, Scotland, Isle of Man and Ireland.

After suffering a period of ill-health, Ó Brádaigh dies on June 5, 2013, at Roscommon County Hospital. His funeral is attended by 1,800 mourners including Fine Gael TD Frank Feighan and is policed by the Garda Emergency Response Unit and Gardaí in riot gear, for “operational reasons,” a show of force believed to have been to deter the republican tradition of firing a three-volley salute of shots over the final place of rest during the graveyard oration. As a result, there are some minor scuffles between gardai and mourners.