Traditional religious distinctions gradually eroded in eighteenth-century England under the impact of enlightenment rationalism: reason replaced revelation as the criterion for belief, order ousted enthusiasm in worship, and interdenominationalism blurred sectarian boundaries in philanthropic endeavors. But the French Revolution, economic troubles and radical political activity after 1815, and intellectual Romanticism put an end to co-operation and encouraged the growth of denominational self-consciousness. That rise of denominationalism led to the greatest conflict between the sects and the Establishment since perhaps the mid-seventeenth century. The clash began on the local level in the 1820s when the Church attempted to use its legal powers to collect rates; the events of 1828-1829 ushered in a period of conflict on the national level, as well. The Church turned to the state for support, only to find that Whigs and Liberals, in power for most of the period before 1874, were erastians and latitudinarians. So the Church in its turn became militant; high-churchmen in particular came to distrust Parliament and to emphasize the independent sources of clerical authority in sacerdotalism and the apostolic succession.

The period from roughly 1830 to 1870 was one of heightened religious tension. Nonconformists, having gained civil equality, now attempted to eliminate other symbols of the Anglican hegemony. Roman Catholics, sloughing off anglo-gallicanism for ultramontanism, asserted their spiritual claims and talked of converting England.