The papacy, repudiating science as absolutely incompatible with its pretensions, had in later years addressed itself to the encouragement of art. But music and painting, though they may be exquisite adornments of life, contain no living force that can develop a weak nation into a strong one; nothing that can permanently assure the material well-being or happiness of communities; and hence at the time of the Reformation, to one who thoughtfully considered her condition, Rome had lost all living energy. She was no longer the arbiter of the physical or the religious progress of the world. For the progressive maxims of the republic and the empire, she had substituted the stationary maxims of the papacy. She had the appearance of piety and the possession of art. In this she resembled one of those friar-corpses which we still see in their brown cowls in the vaults of the Cappuccini, with a breviary or some withered flowers in its hands. From this view of the Eternal City, this survey of what Latin Christianity had done for Rome itself, let us turn to the whole European Continent. Let us try to determine the true value of the system that was guiding society; let us judge it by its fruits. The condition of nations as to their well-being is most precisely represented by the variations of their population. Forms of government have very little influence on population, but policy may control it completely. It has been very satisfactorily shown by authors who have given attention to the subject, that the variations of population depend upon the interbalancing of the generative force of society and the resistances to life. By the generative force of society is meant that instinct which manifests itself in the multiplication of the race. To some extent it depends on climate; but, since the climate of Europe did not sensibly change between the fourth and the sixteenth centuries, we may regard this force as having been, on that continent, during the period under consideration, invariable. By the resistances to life is meant whatever tends to make individual existence more difficult of support. Among such may be enumerated insufficient food, inadequate clothing, imperfect shelter. It is also known that, if the resistances become inappreciable, the generative force will double a population in twenty-five years. The resistances operate in two modes: 1. Physically; since they diminish the number of births, and shorten the term of the life of all. 2. Intellectually; since, in a moral, and particularly in a religious community, they postpone marriage, by causing individuals to decline its responsibilities until they feel that they are competent to meet the charges and cares of a family. Hence the explanation of a long-recognized fact, that the number of marriages during a given period has a connection with the price of food.