This is a brief highly readable history of the Catholic experience in British America, which shaped the development of the colonies and the nascent republic in the seventeenth and eighteenth centuries. Historian Robert Emmett Curran begins his account with the English reformation, which helps us to understand the Catholic exodus from England, Ireland, and Scotland that took place over the nearly two centuries that constitute the colonial period. The deeply rooted English understanding of Catholics as enemies of the political and religious values at the heart of British tradition, ironically acted as a catalyst for the emergence of a Catholic republican movement that was a critical factor in the decision of a strong majority of American Catholics in 1775 to support the cause for independence.