"Entertaining and thought-provoking." (Times Literary Supplement) "Zamoyski skillfully brings together all the strains of eighteenth- and nineteenth-century nationalism, from the American Revolution to the Paris Commune, showing how quasi-religious idealism prepared the way for both fascism and communism. . . . A stimulating and finely written book." (Antony Beevor, author of Stalingrad) From the first shots of the American Revolution in 1776 to the last agony of the Paris Commune in 1871, Adam Zamoyski recreates an era when determined men and women were willing to die for the cause of an idealized nation, and who transformed the society of Europe and its colonies. Moving fluidly through the history of the tumultuous years that embraced the American and French revolutions, the Irish Rebellion, the Polish uprisings, the liberation of South America, and the Italian Risorgimento, Holy Madness captures the passion of revolutionary figures who were caught up in the fervor of the nationalist crusade, while exposing the dangerous fallacies of their idealism.