(2) He insists on the public value of free discussion. "In me you have a stimulating critic, persistently urging you with persuasion and reproaches, persistently testing your opinions and trying to show you that you are really ignorant of what you suppose you know. Daily discussion of the matters about which you hear me conversing is the highest good for man. Life that is not tested by such discussion is not worth living."
Thus in what we may call the earliest justification of liberty of thought we have two significant claims affirmed: the indefeasible right of the conscience of the individual—a claim on which later struggles for liberty were to turn; and the social importance of discussion and criticism. The former claim is not based on argument but on intuition; it rests in fact on the assumption of some sort of superhuman moral principle, and to those who, not having the same personal experience as Socrates, reject this assumption, his pleading does not carry weight. The second claim, after the experience of more than 2,000 years, can be formulated more comprehensively now with bearings of which he did not dream.
The circumstances of the trial of Socrates illustrate both the tolerance and the intolerance which prevailed at Athens. His long immunity, the fact that he was at last indicted from political motives and perhaps personal also, the large minority in his favour, all show that thought was normally free, and that the mass of intolerance which existed was only fitfully invoked, and perhaps most often to serve other purposes. I may mention the case of the philosopher Aristotle, who some seventy years later left Athens because he was menaced by a prosecution for blasphemy, the charge being a pretext for attacking one who belonged to a certain political party. The persecution of opinion was never organized.
It may seem curious that to find the persecuting spirit in Greece we have to turn to the philosophers. Plato, the most brilliant disciple of Socrates, constructed in his later years an ideal State. In this State he instituted a religion considerably different from the current religion, and proposed to compel all the citizens to believe in his gods on pain of death or imprisonment. All freedom of discussion was excluded under the cast-iron system which he conceived. But the point of interest in his attitude is that he did not care much whether a religion was true, but only whether it was morally useful; he was prepared to promote morality by edifying fables; and he condemned the popular mythology not because it was false, but because it did not make for righteousness.
The outcome of the large freedom permitted at Athens was a series of philosophies which had a common source in the conversations of Socrates. Plato, Aristotle, the Stoics, the Epicureans, the Sceptics—it may be maintained that the efforts of thought represented by these names have had a deeper influence on the progress of man than any other continuous intellectual movement, at least until the rise of modern science in a new epoch of liberty.
The doctrines of the Epicureans, Stoics, and Sceptics all aimed at securing peace and guidance for the individual soul. They were widely propagated throughout the Greek world from the third century B.C., and we may say that from this time onward most well-educated Greeks were more or less rationalists. The teaching of Epicurus had a distinct anti-religious tendency. He considered fear to be the fundamental motive of religion, and to free men's minds from this fear was a principal object of his teaching. He was a Materialist, explaining the world by the atomic theory of Democritus and denying any divine government of the universe.[2] He did indeed hold the existence of gods, but, so far as men are concerned, his gods are as if they were not—living in some remote abode and enjoying a "sacred and everlasting calm." They just served as an example of the realization of the ideal Epicurean life.
There was something in this philosophy which had the power to inspire a poet of singular genius to expound it in verse. The Roman Lucretius (first century B.C.) regarded Epicurus as the great deliverer of the human race and determined to proclaim the glad tidings of his philosophy in a poem On the Nature of the World.[3] With all the fervour of a religious enthusiast he denounces religion, sounding every note of defiance, loathing, and contempt, and branding in burning words the crimes to which it had urged man on. He rides forth as a leader of the hosts of atheism against the walls of heaven. He explains the scientific arguments as if they were the radiant revelation of a new world; and the rapture of his enthusiasm is a strange accompaniment of a doctrine which aimed at perfect calm. Although the Greek thinkers had done all the work and the Latin poem is a hymn of triumph over prostrate deities, yet in the literature of free thought it must always hold an eminent place by the sincerity of its audacious, defiant spirit. In the history of rationalism its interest would be greater if it had exploded in the midst of an orthodox community. But the educated Romans in the days of Lucretius were sceptical in religious matters, some of them were Epicureans, and we may suspect that not many of those who read it were shocked or influenced by the audacities of the champion of irreligion.
The Stoic philosophy made notable contributions to the cause of liberty and could hardly have flourished in an atmosphere where discussion was not free. It asserted the rights of individuals against public authority. Socrates had seen that laws may be unjust and that peoples may go wrong, but he had found no principle for the guidance of society. The Stoics discovered it in the law of nature, prior and superior to all the customs and written laws of peoples, and this doctrine, spreading outside Stoic circles, caught hold of the Roman world and affected Roman legislation.
These philosophies have carried us from Greece to Rome. In the later Roman Republic and the early Empire, no restrictions were imposed on opinion, and these philosophies, which made the individual the first consideration, spread widely. Most of the leading men were unbelievers in the official religion of the State, but they considered it valuable for the purpose of keeping the uneducated populace in order. A Greek historian expresses high approval of the Roman policy of cultivating superstition for the benefit of the masses. This was the attitude of Cicero, and the view that a false religion is indispensable as a social machine was general among ancient unbelievers. It is common, in one form or another, to-day; at least, religions are constantly defended on the ground not of truth but of utility. This defence belongs to the statecraft of Machiavelli, who taught that religion is necessary for government, and that it may be the duty of a ruler to support a religion which he believes to be false.
A word must be said of Lucian (second century A.D.), the last Greek man of letters whose writings appeal to everybody. He attacked the popular mythology with open ridicule. It is impossible to say whether his satires had any effect at the time beyond affording enjoyment to educated infidels who read them. Zeus in a Tragedy Part is one of the most effective. The situation which Lucian imagined here would be paralleled if a modern writer were blasphemously to represent the Persons of the Trinity with some eminent angels and saints discussing in a celestial smoke-room the alarming growth of unbelief in England and then by means of a telephonic apparatus overhearing a dispute between a freethinker and a parson on a public platform in London. The absurdities of anthropomorphism have never been the subject of more brilliant jesting than in Lucian's satires.
The general rule of Roman policy was to tolerate throughout the Empire all religions and all opinions. Blasphemy was not punished. The principle was expressed in the maxim of the Emperor Tiberius: "If the gods are insulted, let them see to it themselves." An exception to the rule of tolerance was made in the case of the Christian sect, and the treatment of this Oriental religion may be said to have inaugurated religious persecution in Europe. It is a matter of interest to understand why Emperors who were able, humane, and not in the least fanatical, adopted this exceptional policy.
For a long time the Christians were only known to those Romans who happened to hear of them, as a sect of the Jews. The Jewish was the one religion which, on account of its exclusiveness and intolerance, was regarded by the tolerant pagans with disfavour and suspicion. But though it sometimes came into collision with the Roman authorities and some ill-advised attacks upon it were made, it was the constant policy of the Emperors to let it alone and to protect the Jews against the hatred which their own fanaticism aroused. But while the Jewish religion was endured so long as it was confined to those who were born into it, the prospect of its dissemination raised a new question. Grave misgivings