And here the social ideas of Leo XIII come in. Whilst yet Bishop of Perugia he wrote a pastoral letter in which a vague humanitarian socialism appeared. As soon, however, as he had assumed the triple crown his opinions changed and he anathematised the revolutionaries whose audacity was terrifying Italy. But almost at once he corrected himself, warned by events and realising the great danger of leaving socialism in the hands of the enemies of the Church. Then he listened to the bishops of the lands of p********a, ceased to intervene in the Irish quarrel, withdrew the excommunications which he had launched against the American “knights of labour,” and would not allow the bold works of Catholic socialist writers to be placed in the Index. This evolution towards democracy may be traced through

