Book excerpt: This book looks at how that oft-maligned institution, the Anglican Church, coped with mass migration from Britain in the first half of the nineteenth century. The book details the great array of institutions, voluntary societies and inter-colonial networks that furnished the Church with the men and money that enabled it to sustain a common institutional structure and a common set of beliefs across a rapidly-expanding ‘British world’. It also sheds light on how this institutional context contributed to the formation of colonial Churches with distinctive features and identities. One of the book’s key aims is to show how the colonial Church should be of interest to more than just scholars and students of religious and Church history. The colonial Church was an institution that played a vital role in the formation of political publics and ethnic communities in a settler empire that was being remoulded by the advent of mass migration, democracy and the separation of Church and State.