This, however, does not explain the succession of empires in the world, the changes of the scene of prosperity from one people or set of peoples to another.

Le Roy finds the cause in providential design.

God, he believes, cares for all parts of the universe and has distributed excellence in arms and letters now to Asia, now to Europe, again to Africa, letting virtue and vice, knowledge and ignorance travel from country to country, that all in their turn may share in good and bad fortune, and none become too proud through prolonged prosperity.
But what of the modern age in Western Europe?
It is fully the equal, he assevers, of the most illustrious ages of the past, and in some respects it is superior.

Almost all the liberal and mechanical arts of antiquity, which had been lost for about 1200 years, have been restored, and there have been new inventions, especially printing, and the mariner's compass, and "I would give the third place to gunnery but that it seems invented rather for the ruin than for the utility of the human race." In our knowledge of astronomy and cosmography we surpass the ancients.

"We can affirm that the whole world is now known, and all the races of men; they can interchange all their commodities and mutually supply their needs, as inhabitants of the same city or world-state." And hence there has been a notable increase of wealth.
Vice and suffering, indeed, are as grave as ever, and we are afflicted by the trouble of heresies; but this does not prove a general deterioration of morals.