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Union and inequality
The Act of Union created the United Kingdom of Great Britain and Ireland in 1801 after the rebellion of 1798. The Dublin Parliament disappeared, while questions of representation, religion and land remained unresolved.
Catholic emancipation in 1829 removed important restrictions but did not equalise political power. Daniel O'Connell mobilised mass support for reform and repeal, demonstrating new forms of popular politics.
Famine and land
Potato blight struck a population heavily dependent on one crop. More than a million people died and many more emigrated while food continued to leave Ireland and relief policy remained constrained by ideology and administrative failure.
The Great Famine transformed population, language and politics. Later land agitation secured reforms for tenant farmers, but memories of eviction and state response deepened nationalist criticism of the Union.
Home rule and resistance
Parliamentary nationalists sought self-government within the United Kingdom, while unionists—especially in Ulster—opposed rule from Dublin. Armed volunteer organisations formed on both sides during the crisis before 1914.
The Easter Rising of 1916 had limited immediate support, but executions and wartime repression altered opinion. Sinn Féin's 1918 victory led to an independent parliament and a guerrilla war against British rule.
Treaty, partition and civil war
The 1921 Anglo-Irish Treaty created the Irish Free State while Northern Ireland remained in the United Kingdom. The boundary reflected organised unionism and demographic geography but left substantial minorities on both sides.
Disagreement over the treaty divided former republican allies and produced civil war. Sovereignty expanded over later decades, yet partition and contested memory continued to shape politics across the island.
Why It Matters
Ireland's modern history reveals how constitutional reform, mass politics, empire, violence and identity interacted, and why partition cannot be reduced to one rebellion or treaty.