Let it not be thought, as some of us might be prone to think, that the timeliness of the discovery of the western hemisphere, in its relation to church history, is summed up in this, that it coincided with the Protestant Reformation, so that the New World might be planted with a Protestant Christianity. For a hundred years the colonization and evangelization of America were, in the narrowest sense of that large word, Catholic, not Protestant. But the Catholicism brought hither was that of the sixteenth century, not of the fifteenth. It is a most one-sided reading of the history of that illustrious age which fails to recognize that the great Reformation was a reformation _of_ the church as well as a reformation _from_ the church. It was in Spain itself, in which the corruption of the church had been foulest, but from which all symptoms of "heretical pravity" were purged away with the fiercest zeal as fast as they appeared,--in Spain under the reign of Ferdinand and Isabella the Catholic,--that the demand for a Catholic reformation made itself earliest and most effectually felt. The highest ecclesiastical dignitary of the realm, Ximenes, confessor to the queen, Archbishop of Toledo, and cardinal, was himself the leader of reform. No changes in the rest of Christendom were destined for many years to have so great an influence on the course of evangelization in North America as those which affected the church of Spain; and of these by far the most important in their bearing on the early course of Christianity in America were, first, the purifying and quickening of the miserably decayed and corrupted mendicant orders,--ever the most effective arm in the missionary service of the Latin Church,--and, a little later, the founding of the Society of Jesus, with its immense potency for good and for evil. At the same time the court of Rome, sobered in some measure, by the perilous crisis that confronted it, from its long orgy of simony, nepotism, and sensuality, began to find time and thought for spiritual duties. The establishment of the "congregations" or administrative boards, and especially of the _Congregatio de Propaganda Fide_, or board of missions, dates chiefly from the sixteenth century. The revived interest in theological study incident to the general spiritual quickening gave the church, as the result of the labors of the Council of Trent, a well-defined body of doctrine, which nevertheless was not so narrowly defined as to preclude differences and debates among the diverse sects of the clergy, by whose competitions and antagonisms the progress of missions both in Christian and in heathen lands was destined to be so seriously affected.