This book is a cultural and intellectual history of anti-Catholicism in the period 1840-1870. The book will have two major themes: trans-nationalism and gender. Previous approaches to anti-Catholicism in the United States have adopted an exclusively national focus. This book breaks new ground by exploring the trans-Atlantic ties joining opponents of Catholicism in the United States and in France. The anticlerical works of major French writers such as Jules Michelet and Edgar Quinet flowed into the United States in the middle decades of the century. From the French perspective, the United States offered a model in combating the alleged ambitions of the Church. The literature and ideas which passed through this trans-Atlantic channel were overwhelmingly concerned with masculinity, femininity and domesticity. On both sides of the Atlantic, anti-Catholic literature was filled with images of priests or Jesuits craftily usurping the authority of fathers, of young girls tricked into entering convents and then subjected to merciless sexual and physical abuse, of families torn apart by the agents of the Church. Of course, the gender and domestic ideals underlying this opposition to Catholicism were not identical across the two societies. Nevertheless, gender and domesticity acted as a platform on which the trans-Atlantic case against Catholicism was built.