her champions, being human, could not help making use of reasoning processes and the result was that they were divided among themselves. This gave reason her chance. Operating, as it were, in the enemy's camp and professedly in the enemy's cause, she was preparing her own victory.
It may be objected that there is a legitimate domain for authority, consisting of doctrines which lie outside human experience and therefore cannot be proved or verified, but at the same time cannot be disproved. Of course, any number of propositions can be invented which cannot be disproved, and it is open to any one who possesses exuberant faith to believe them; but no one will maintain that they all deserve credence so long as their falsehood is not demonstrated. And if only some deserve credence, who, except reason, is to decide which? If the reply is, Authority, we are confronted by the difficulty that many beliefs backed by authority have been finally disproved and are universally abandoned. Yet some people speak as if we were not justified in rejecting a theological doctrine unless we can prove it false. But the burden of proof does not lie upon the rejecter. I remember a conversation in which, when some disrespectful remark was made about hell, a loyal friend of that establishment said triumphantly, "But, absurd as it may seem, you cannot disprove it." If you were told that in a certain planet revolving round Sirius there is a race of donkeys who talk the English language and spend their time in discussing eugenics, you could not disprove the statement, but would it, on that account, have any claim to be believed? Some minds would be prepared to accept it, if it were reiterated often enough, through the potent force of suggestion. This force, exercised largely by emphatic repetition (the theoretical basis, as has been observed, of the modern practice of advertising), has played a great part in establishing authoritative opinions and propagating religious creeds. Reason fortunately is able to avail herself of the same help.
The following sketch is confined to Western civilization. It begins with Greece and attempts to indicate the chief phases. It is the merest introduction to a vast and intricate subject, which, treated adequately, would involve not only the history of religion, of the Churches, of heresies, of persecution, but also the history of philosophy, of the natural sciences and of political theories. From the sixteenth century to the French Revolution nearly all important historical events bore in some way on the struggle for freedom of thought. It would require a lifetime to calculate, and many books to describe, all the directions and interactions of the intellectual and social forces which, since the fall of ancient civilization, have hindered and helped the emancipation of reason. All one can do, all one could do even in a much bigger volume than this, is to indicate the general course of the struggle and dwell on some particular aspects which the writer may happen to have specially studied.
CHAPTER II REASON FREE (GREECE AND ROME)
When we are asked to specify the debt which civilization owes to the Greeks, their achievements in literature and art naturally occur to us first of all. But a truer answer may be that our deepest gratitude is due to them as the originators of liberty of thought and discussion. For this freedom of spirit was not only the condition of their speculations in philosophy, their progress in science, their experiments in political institutions; it was also a condition of their literary and artistic excellence. Their literature, for instance, could not have been what it is if they had been debarred from free criticism of life. But apart from what they actually accomplished, even if they had not achieved the wonderful things they did in most of the realms of human activity, their assertion of the principle of liberty would place them in the highest rank among the benefactors of the race; for it was one of the greatest steps in human progress.
We do not know enough about the earliest history of the Greeks to explain how it was that they attained their free outlook upon the world and came to possess the will and courage to set no bounds to the range of their criticism and curiosity. We have to take this character as a fact. But it must be remembered that the Greeks consisted of a large number of separate peoples, who varied largely in temper, customs and traditions, though they had important features common to all. Some were conservative, or backward, or unintellectual compared with others. In this chapter "the Greeks" does not mean all the Greeks, but only those who count most in the history of civilization, especially the Ionians and Athenians.
Ionia in Asia Minor was the cradle of free speculation. The history of European science and European philosophy begins in Ionia. Here (in the sixth and fifth centuries B.C.) the early philosophers by using their reason sought to penetrate into the origin and structure of the world. They could not of course free their minds entirely from received notions, but they began the work of destroying orthodox views and religious faiths. Xenophanes may specially be named among these pioneers of thought (though he was not the most important or the ablest), because the toleration of his teaching illustrates the freedom of the atmosphere in which these men lived. He went about from city to city, calling in question on moral grounds the popular beliefs about the gods and goddesses, and ridiculing the anthropomorphic conceptions which the Greeks had formed of their divinities. "If oxen had hands and the capacities of men, they would make gods in the shape of oxen." This attack on received theology was an attack on the veracity of the old poets, especially Homer, who was considered the highest authority on mythology. Xenophanes criticized him severely for ascribing to the gods acts which, committed by men, would be considered highly disgraceful. We do not hear that any attempt was made to restrain him from thus assailing traditional beliefs and branding Homer as immoral. We must remember that the Homeric poems were never supposed to be the word of God. It has been said that Homer was the Bible of the Greeks. The remark exactly misses the truth. The Greeks fortunately had no Bible, and this fact was both an expression and an important condition of their freedom. Homer's poems were secular, not religious, and it may be noted that they are freer from immorality and savagery than sacred books that one could mention. Their authority was immense; but it was not binding like the authority of a sacred book, and so Homeric criticism was never hampered like Biblical criticism.
In this connexion, notice may be taken of another expression and condition of freedom, the absence of sacerdotalism. The priests of the temples never became powerful castes, tyrannizing over the community in their own interests and able to silence voices raised against religious beliefs. The civil authorities kept the general control of public worship in their own hands, and, if some priestly families might have considerable influence, yet as a rule the priests were virtually State servants whose voice carried no weight except concerning the technical details of ritual.
To return to the early philosophers, who were mostly materialists, the record of their speculations is an interesting chapter in the history of rationalism. Two great names may be selected, Heraclitus and Democritus, because they did more perhaps than any of the others, by sheer hard thinking, to train reason to look upon the universe in new ways and to shock the unreasoned conceptions of common sense. It was startling to be taught, for the first time, by Heraclitus, that the appearance of stability and permanence which material things present to our senses is a false appearance, and that the world and everything in it are changing every instant. Democritus performed the amazing feat of working out an atomic theory of the universe, which was revived in the seventeenth century and is connected, in the history of speculation, with the most modern physical and chemical theories of matter. No fantastic tales of creation, imposed by sacred authority, hampered these powerful brains.
All this philosophical speculation prepared the way for the educationalists who were known as the Sophists. They begin to appear after the middle of the fifth century. They worked here and there throughout Greece, constantly travelling, training young men for public life, and teaching them to use their reason. As educators they had practical ends in view. They turned away from the problems of the physical universe to the problems of human life—morality and politics. Here they were confronted with the difficulty of distinguishing between truth and error, and the ablest of them investigated the nature of knowledge, the method of reason—logic—and the instrument of reason—speech. Whatever their particular theories might be, their general spirit was that of free inquiry and discussion. They sought to test everything by reason. The second