Before considering this new phase through which the human mind was to pass it is necessary to guard against a common misapprehension in the use of the term "Middle Ages". Our historical textbooks usually include in that period the happenings between the dissolution of the Roman Empire and the voyages of Columbus or the opening of the Protestant revolt. To the student of intellectual history this is unfortunate, for the simple reason that almost all the ideas and even institutions of the Middle Ages, such as the church and monasticism and organized religious intolerance, really originated in the late Roman Empire. Moreover, the intellectual revolution which has ushered in the thought of our day did not get well under way until the seventeenth century. So one may say that medieval thought began long before the accepted beginning of the Middle Ages and persisted a century or so after they are ordinarily esteemed to have come to an end. We have to continue to employ the old expression for convenience' sake, but from the standpoint of the history of the European mind three periods should be distinguished, lying between ancient Greek thought as it was flourishing in Athens, Alexandria, Rhodes, Rome, and elsewhere at the opening of the Christian era, and the birth of modern science some sixteen hundred years later.
The first of these is the period of the Christian Fathers, culminating in the authoritative writings of Augustine, who died in 430. By this time a great part of the critical Greek books had disappeared in western Europe. As for pagan writers, one has difficulty in thinking of a single name (except that of Lucian) later than Juvenal, who had died nearly three hundred years before Augustine. Worldly knowledge was reduced to pitiful compendiums on which the mediaeval students were later to place great reliance. Scientific, literary, and historical information was scarcely to be had. The western world, so far as it thought at all, devoted its attention to religion and all manner of mystical ideas, old and new. As Harnack has so well said, the world was already intellectually bankrupt before the German invasions and their accompanying disorders plunged it into still deeper ignorance and mental obscurity.
The second, or "Dark Age", lasted with only slight improvement from Augustine to Abélard, about seven hundred years. The prosperous villas disappeared; towns vanished or shriveled up; libraries were burned or rotted away from neglect; schools were closed, to be reopened later here and there, after Charlemagne's educational edict, in an especially enterprising monastery or by some exceptional bishop who did not spend his whole time in fighting.
From about the year 1100 conditions began to be more and more favorable to the revival of intellectual ambition, a recovery of forgotten knowledge, and a gradual accumulation of new information and inventions unknown to the Greeks, or indeed to any previous civilization. The main presuppositions of this third period of the later Middle Ages go back, however, to the Roman Empire. They had been formulated by the Church Fathers, transmitted through the Dark Age, and were now elaborated by the professors in the newly established universities under the influence of Aristotle's recovered works and built up into a majestic intellectual structure known as Scholasticism. On these mediaeval university professors—the schoolmen—Lord Bacon long ago pronounced a judgment that may well stand to-day. "Having sharp and strong wits, and abundance of leisure, and small variety of reading, but their wits being shut up in the cells of a few authors (chiefly Aristotle, their dictator), as their persons were shut up in the cells of monasteries and colleges, and knowing little history, either of nature or time [they], did out of no great quantity of matter and infinite agitation of wit spin out unto us those laborious webs of learning which are extant in their books."
Our civilization and the human mind, critical and uncritical, as we now find it in our western world, is a direct and uninterrupted outgrowth of the civilization and thought of the later Middle Ages. Very gradually only did peculiarly free and audacious individual thinkers escape from this or that mediaeval belief, until in our own day some few have come to reject practically all the presuppositions on which the Scholastic system was reared. But the great mass of Christian believers, whether Catholic or Protestant, still professedly or implicitly adhere to the assumptions of the Middle Ages, at least in all matters in which religious or moral sanctions are concerned. It is true that outside the Catholic clergy the term "mediaeval" is often used in a sense of disparagement, but that should not blind us to the fact that mediaeval presumptions, whether for better or worse, are still common. A few of the most fundamental of these presuppositions especially germane to our theme may be pointed out here.
11. OUR MEDIAEVAL INTELLECTUAL INHERITANCE
The Greeks and Romans had various theories of the origin of things, all vague and admittedly conjectural. But the Christians, relying upon the inspired account in the Bible, built their theories on information which they believed vouchsafed to them by God himself. Their whole conception of human history was based upon a far more fundamental and thorough supernaturalism than we find among the Greeks and Romans. The pagan philosophers reckoned with the gods, to be sure, but they never assumed that man's earthly life should turn entirely on what was to happen after death. This was in theory the sole preoccupation of the mediaeval Christian. Life here below was but a brief, if decisive, preliminary to the real life to come.
The mediaeval Christian was essentially more polytheistic than his pagan predecessors, for he pictured hierarchies of good and evil spirits who were ever aiding him to reach heaven or seducing him into the paths of sin and error. Miracles were of common occurrence and might be attributed either to God or the devil; the direct intervention of both good and evil spirits played a conspicuous part in the explanation of daily acts and motives.[20]
As a distinguished church historian has said, the God of the Middle Ages was a God of arbitrariness—the more arbitrary the more Godlike. By frequent interferences with the regular course of events he made his existence clear, reassured his children of his continued solicitude, and frustrated the plots of the Evil One. Not until the eighteenth century did any considerable number of thinkers revolt against this conception of the Deity and come to worship a God of orderliness who abode by his own laws.
The mediaeval thinkers all accepted without question what Santayana has strikingly described as the "Christian Epic". This included the general historical conceptions of how man came about, and how, in view of his origin and his past, he should conduct his life. The universe had come into being in less than a week, and man had originally been created in a state of perfection along with all other things—sun, moon, and stars, plants and animals. After a time the first human pair had yielded to temptation, transgressed God's commands, and been driven from the lovely garden in which he had placed them. So sin came into the world, and the offspring of the guilty pair were thereby contaminated and defiled from the womb.