Based on the author's doctoral dissertation, this highly specialized work deals with the Irish Nationalist movement on both sides of the Atlantic primarily during the years 1870-1890. Irish Nationalism here was a very complicated and ambiguous matter. Its primary aim was the financial and moral support to the Home Rule movement directed by Charles Stewart Parnell. But there were various elements within the Nationalist framework which objected to Parnell's parliamentary and gradualist approach. There were the social radicals who felt that Irish Nationalism should be tied in with the overall cause of the proletariat. There were the land reformers who didn't place much emphasis on the ballot box. And there were the terrorists, the dynamiters and the assassinators. On top of all of this there was the Church, lending its authority here, denying it there. Parnell was the force which kept all these factions together, but it was under his leadership that the one-time demand for a sovereign Ireland was scaled down to a claim for local self-government. The author ends his story with the fall of Parnell in 1890 when he was named in a divorce case. This book is for scholars. For partisans among them, however, it should raise questions about the author's understanding of radicalism--for example, his comparisons between political terrorists and today's Mafia. The general reader would find more satisfaction with William Shannon's The American Irish.