The history of Ireland in the twentieth century was dominated by the political and sectarian divide between the north and the south, leading to sustaining armed violence over several decades. These Government documents of the British administration in Northern Ireland 1921-72 (CAB/4) offer what have been described as the best continuous record of government activity and decision-making in the world, and shows "how government actually worked". The papers contained in Northern Ireland: A Divided Community, 1921-1972 are a complete digital facsimile of the Cabinet Conclusion files of the Northern Ireland Government, filed as CAB/4 at the Public Record Office of Northern Ireland (PRONI). These CAB/4 files contain a full record of every debate and transaction for the entire duration of the Stormont administration, the devolved government of Northern Ireland. Separate files exist for each Cabinet Meeting and include minutes and memoranda. The discussions and decisions reflect the wide range of problems and activities involved in making the new administration work. Topics debated and reported in just one sample year of the Troubles (1970) include: policing, arms and explosives, social need, prevention of incitement to religious hatred, army occupation of factories, road spiking, routing of Orange Day parades, dock strikes, law and order, riots, and the roles of the Ulster Defence Regiment (UDR) and the Royal Ulster Constabulary (RUC).