McGowan traces the evolution of the Catholic community from an isolated religious and Irish ethnic subculture in the late nineteenth century into an integrated segment of English Canadian society by the early twentieth century. English-speaking Catholics moved into all neighbourhoods of the city and socialized with and married non-Catholics. They even embraced their own brand of imperialism: by 1914 thousands of them had enlisted to fight for God and the British Empire.

McGowan's detailed and lively portrait will be of great interest to students and scholars of religious history, Irish studies, ethnic history, and Canadian history.