That her nations could so quickly overcome such a fearful concussion in their external circumstances, and, in general, without retrograding more than they actually did, could so develop their energies in the following century, is a most convincing proof of the indestructibility of human society as a whole. To assume, however, that it did not suffer any essential change internally, because in appearance everything remained as before, is inconsistent with a just view of cause and effect. Many historians seem to have adopted such an opinion; accustomed, as usual, to judge of the moral condition of the people solely according to the vicissitudes of earthly power, the events of battles, and the influence of religion, but to pass over with indifference the great phenomena of nature, which modify, not only the surface of the earth, but also the human mind. Hence, most of them have touched but superficially on the "Great Mortality" of the fourteenth century. We, for our parts, are convinced that in the history of the world the Black Death is one of the most important events which have prepared the way for the present state of Europe. He who studies the human mind with attention, and forms a deliberate judgment on the intellectual powers which set people and States in motion, may perhaps find some proofs of this assertion in the following observations:--at that time, the advancement of the hierarchy was, in most countries, extraordinary; for the Church acquired treasures and large properties in land, even to a greater extent than after the Crusades; but experience has demonstrated that such a state of things is ruinous to the people, and causes them to retrograde, as was evinced on this occasion. After the cessation of the Black Plague, a greater fecundity in women was everywhere remarkable--a grand phenomenon, which, from its occurrence after every destructive pestilence, proves to conviction, if any occurrence can do so, the prevalence of a higher power in the direction of general organic life. Marriages were, almost without exception, prolific; and double and triple births were more frequent than at other times; under which head, we should remember the strange remark, that after the "Great Mortality" the children were said to have got fewer teeth than before; at which contemporaries were mightily shocked, and even later writers have felt surprise.