"Should these speculations (on the future of humanity) be found doubtful or fallacious, there still remains a more humble source of comfort and hope. The discoveries of ancient and modern navigators, and the domestic history or tradition of the most enlightened nations, represent the human savage naked both in mind and body, and destitute of laws, of arts, of ideas, and almost of language. From this abject condition, perhaps the primitive and universal state of man, he has gradually arisen to command the animals, to fertilise the earth, to traverse the ocean, and to measure the heavens. His progress in the improvement and exercise of his mental and corporeal faculties has been irregular and various; infinitely slow in the beginning, and increasing by degrees with redoubled velocity: ages of laborious ascent have been followed by a moment of rapid downfall; and the several climates of the globe have felt the vicissitudes of light and
darkness. Yet the experience of four thousand years should enlarge our hopes and diminish our apprehensions: we cannot determine to what height the human species may aspire in their advance towards perfection; but it may safely be presumed that no people, unless the face of nature is changed, will relapse into their original barbarism.
The improvements of society may be viewed under a threefold aspect.
1. The poet or philosopher illustrates his age and country by the efforts of a single mind; but these superior powers of reason or fancy are rare and spontaneous productions; and the genius of Homer, or Cicero, or Newton, would excite less admiration if they could be created by the will of a prince or the lessons of a preceptor.
2. The benefits of law and policy, of trade and manufactures, of arts and sciences, are more solid and permanent; and many individuals may be qualified, by education and discipline, to promote, in their respective stations, the interest of the community. But this general order is the effect of skill and labour; and the complex machinery may be decayed by time, or injured by violence.
3. Fortunately for mankind, the more useful, or, at least, more necessary arts, can be performed without superior talents or national subordination; without powers of one, or the union of many. Each village, each family, each individual, must always possess both ability and inclination to perpetuate the use of fire and of metals; the propagation and service of domestic animals; the methods of hunting and fishing; the rudiments of navigation; the imperfect cultivation of corn or other nutritive grain; and the simple practice of the mechanic trades. Private genius and public industry may be extirpated, but these hardy plants survive the tempest, and strike an everlasting root into the most unfavourable soil. The splendid days of Augustus and Trajan were eclipsed by a cloud of ignorance; and the barbarians subverted the laws and palaces of Rome. But the scythe, the invention or emblem of Saturn, still continued annually to mow the harvests of Italy; and the human feasts of the Laestrigons have never been renewed on the coast of Campania.
Since the first discovery of the arts, war, commerce, and religious zeal have diffused among the savages of the Old and New World these inestimable gifts: they have been successively propagated; they can never be lost. We may therefore acquiesce in the pleasing conclusion that every age of the world has increased and still increases the real wealth, the happiness, the knowledge, and perhaps the virtue, of the human race." – Edward Gibbon, The Decline and Fall of the Roman Empire, edited by J. B. Bury, 7 vols. (1896-1902), vol. IV, pp. 160-169