The Dublin lock-out was a major industrial dispute between approximately 20,000 workers and 300 employers that took place in Dublin, Ireland. The dispute, lasting from 26 August 1913 to 18 January 1914, is often viewed as the most severe and significant industrial dispute in Irish history. Central to the dispute was the workers' right to unionise.

Captain James Robert "Jack" White, DSO (1879–1946) was an Irish republican and libertarian socialist. After colonial service in the British military, he entered Irish politics in 1913 working with Roger Casement in Ulster to detach fellow Protestants from Unionism as it armed to resist Irish Home Rule, and with James Connolly to defend the Irish Transport and General Workers' Union in the great Dublin lock-out. White rallied to the defence of those condemned for the 1916 Easter Rising, but the combination of his socialism and anti-clericalism placed him at odds with the principal currents of Irish republicanism. Until experience of Republican Spain in 1936 convinced him of the anarchist critique of the party-state, he associated with a succession of communist-aligned groups. His last public appearance was in 1945, at an Orange Hall in his home town of Broughshane, County Antrim, where he proposed himself as a "republican socialist" candidate in the upcoming United Kingdom general election.