Irish Unionism is a political ideology that advocates for the continued political union of Ireland with Great Britain. It emerged in the 19th century, primarily among the Protestant population in Northern Ireland, who identified as British and sought to maintain their connection to the United Kingdom. Unionists often emphasize loyalty to the British Crown and the benefits of being part of a larger political entity. The movement has historically been associated with the Ulster Unionist Party and has played a significant role in the political landscape of Northern Ireland, especially during the Troubles in the late 20th century.