After his conversion to Roman Catholicism, the first major controversy in which Henry Edward Manning found himself involved as a member of his new church concerned the Roman Question, or the Temporal Power; that is, the political status and future of the Papal States. Now the question of the temporal power of the pope, and the amount of controversy it engendered, is one of those issues in nineteenth century church history whose significance it is difficult for us to understand. By the mid-nineteenth century, especially in relation to the movement for Italian unification, the temporal power of the popes looks to us like an historical anachronism. To Roman Catholics today, it is obvious that the ability of the church to preach the gospel has been enhanced and its mission in the world correspondingly facilitated by being disembarrassed of the burden of political control in central Italy. How to explain, then, the tremendous controversy the Roman Question aroused over so long a period in the second half of the nineteenth century, and the conviction, especially of the papacy's defenders, that the preservation of the Papal States was critical for the survival, not only of religion, but, as we shall see, of civilization in the West?