Dorothy MacArdle: the split over the treaty was a driving cause for the civil war, but the "heroic and virtous" perspectives of independence also contributed
Tom Garvin: the Gaelic League did not directly cause the civil war, but it had a permanent impact on the politics of independent Ireland
Max Weber: most civil war are caused by contributing geopolitical factors
Patrick Buckland: there were many links, like family ties, between Irish -pro-unionists and Britain
Patrick Geoghegan: Catholicism greatly defined Irish identity