Isaac Butt was an Irish barrister, editor, politician, Member of Parliament in the House of Commons of the United Kingdom, economist and the founder and first leader of a number of Irish nationalist parties and organisations. He was a leader in the Irish Metropolitan Conservative Society in 1836, the Home Government Association in 1870, and the Home Rule League in 1873. Colin W. Reid argues that Home Rule was the mechanism Butt proposed to bind Ireland to Great Britain. It would end the ambiguities of the Act of Union of 1800. He portrayed a federalised United Kingdom, which would have weakened Irish exceptionalism within a broader British context. Butt was representative of a constructive national unionism. As an economist, he made significant contributions regarding the potential resource mobilisation and distribution aspects of protection, and analysed deficiencies in the Irish economy such as sparse employment, low productivity, and misallocation of land. He dissented from the established Ricardian theories and favoured some welfare state concepts. As editor he made the Dublin University Magazine a leading Irish journal of politics and literature.

Irish nationalism is a nationalist political movement which, in its broadest sense, asserts that the people of Ireland should govern Ireland as a sovereign state. Since the mid-19th century, Irish nationalism has largely taken the form of cultural nationalism based on the principles of national self-determination and popular sovereignty. Irish nationalists during the 18th, 19th, and 20th centuries such as the United Irishmen in the 1790s, Young Irelanders in the 1840s, the Fenian Brotherhood during the 1880s, Fianna Fáil in the 1920s, and Sinn Féin styled themselves in various ways after French left-wing radicalism and republicanism. Irish nationalism celebrates the culture of Ireland, especially the Irish language, literature, music, and sports. It grew more potent during the period in which all of Ireland was part of the United Kingdom, which led to most of the island gaining independence from the UK in 1922.