"In their account of the history of the British Evangelical Alliance, David Hillborn and Ian Randall insist that a desire for Evangelical unity was the primary motivation behind the creation of the organization, citing Essays on Christian Union (1845), among other texts, in support of their claim. However, while the outward expression of a desire for Evangelical unity in the cause of the Gospel permeates this collection of essays, lending credence to the claim of a positive rationale behind the creation of the Alliance, other, more negative, factors are also present, particularly concern about the rise of Roman Catholicism.
The struggle between the Tractarians and Evangelicals during and after the 1830s for control of the Church of England and the Maynooth controversy of 1844, in which the British government gave additional money to a Catholic seminary in Ireland, encouraged anti-Catholic prejudice. Many of the contributions to Essays on Christian Union suggest that anti-Catholicism was more important to the emergence of the Alliance than Randall and Hillborn are willing to admit. Like the identity of any other group, Evangelical identity was construed partly in terms of what they were not, and opposition to Catholicism was integral to their growing self-consciousness. In response to the perceived threat of Catholicism, a threat that one of the contributors to Essays on Christian Union, Ralph Wardlaw, equates with the antichrist, another contributor, Reverend J.A. James, urged:
《Our appeal, therefore, is made to all Evangelical Protestants --Is it not time to unite? Does not your situation require it? Strike hands, then, in a covenant of love and friendship, and form a holy league, aggressive and defensive, against a system which is aiming to destroy you utterly, that it may be left at liberty to pursue its unobstructed course through the world, the consummation of which would be reached in overthrowing Evangelical religion, and planting everywhere a baleful superstition in its place.》"
--Emma Mason and Mark Knight, Nineteenth Century Religion and Literature, Oxford: 2007.