Dr. Sperry points out, we are each inclined to lift our eyebrows at the other’s problems and close our eyes to our own. The two great denominational differences between the States and Britain are that they now have no established Churches, while their Catholic numbers are about ten times ours. Twenty-three millions makes the Catholic Church in America now the largest of all the religious bodies: though that is surpassed by the twenty-five millions the Federal Council of the Churches of Christ can muster. Catholic growth is largely due to the influx of immigrants from European Catholic countries, and their greater birth rate, but also to the considerable number of converts. What has probably contributed to this growth is the fact that there has been little real persecution on either side; Church and State are separated, and so here is a free field and no favour, in which conditions the Catholic Church is not only winning easily, but it likely soon to dominate the situation. At this Americans are getting afraid, and Dean Sperry, while refusing to give way to any of the lower prejudices, does confess that he appreciates the fears others feel. It is feared that Catholicism, if and when it wins, will want Church and State to be united, and will no longer prove tolerant; though he gratefully admits that the first State to make religious toleration part of its constitution was Maryland, a Catholic foundation. He would obviously see with regret the disappearance of the strong individualist element in religion which Protestantism has fostered, and America, in particular, has emphasised as part of its independent and democratic spirit. He suspects that Catholicism is tempted to favour Totalitarianism. If the Dean fails a little, for all his determination to understand, where Catholicism is concerned, it remains to be wondered if any Catholic could have written such a sympathetic, friendly and understanding book.