This work was intended to counteract the effect produced by the writings of Guizot, the great French historian, who maintained, by eloquent and matchless reasoning, that mankind had been improved, in every point of view, by the influences of Protestantism. Accordingly, it was translated from Spanish, in which language it was originally written, into French and German, and extensively circulated in France and Germany. It soon acquired the reputation among the Jesuits of being unanswerable, and on that account was regarded, in the conflict between progress and retrogression, like heavy ordnance in battle--a suitable weapon with which to attack Protestantism and its institutions in the seat of its greatest strength. Therefore it was translated into the English language, and printed by two publishing-houses in the United States, for circulation among the American people. An American preface is attached, wherein these propositions are affirmed: _First_, that Protestantism compels its votaries to infidelity, by its variations of belief; _second_, that civilization was not only commenced but was prospering under "Catholicity," when it was retarded by Protestantism, which is unfavorable and injurious to it; and, _third_, that the principles of Protestantism are incompatible with the happiness of mankind and "unfavorable to civil liberty." This preface--which manifestly bears the Jesuit impress--was intended to notify American readers, beforehand, that the three foregoing propositions are maintained in the body of the work, and to prepare their minds for the acceptance of them. Its reprint and circulation in the United States could have had no other object than to inculcate the belief that what the people of this country have supposed to be the advantages they have derived from Protestant institutions are, in fact, absolutely injurious to them, and that their condition would be improved by the revival of such as existed during the Middle Ages, before the Reformation.