Henry Longueville Mansel (1820-1871), Anglican theologian and philosopher, has wrongly been remembered as a Kantian agnostic whose ideas led to those of Herbert Spencer. Francesca Norman's book provides a thorough revisioning of Mansel's theology in context and reveals the personal basis of Spencer's animus towards Mansel. Mansel is revealed as an orthodox Anglican theistic personalist whose ideas inspired Newman to write his Grammar of Assent. Located in context, Mansel's personal connections with leading Tory figures such as Lord Carnarvon and Benjamin Disraeli are explored. Key controversies with Frederick Denison Maurice and John Stuart Mill are interpreted with reference to the party political elections of 1859 and 1865. Norman offers a vital vision of nineteenth-century theology, philosophy, and politics.