As Ice Age glaciers left behind erratics, so the external forces of history tumbled the Irish into America. Existing both out of time and out of space, a diverse range of these Roman-Catholic immigrants saw their new country in a much different way than did the Protestants who settled and claimed it. These erratics chose backward looking tradition and independence over assimilation and embraced a quintessentially Irish form of subversiveness that arose from their culture, faith, and working-class outlook. David M. Emmons draws on decades of research and thought to plumb the mismatch of values between Protestant Americans hostile to Roman Catholicism and the Catholic Irish strangers among them. Joining ethnicity and faith to social class, Emmons explores the unique form of dissidence that arose when Catholic Irish workers and their sympathizers rejected the beliefs and symbols of American capitalism. A vibrant and original tour de force, History’s Erratics explores the ancestral roots of Irish nonconformity and defiance in America.