In its brilliant pages may be found a conspectus of the intellectual life of the day, on the side of the religious problem. Every type of thinker is there tersely characterized—the orthodox, the deist, the atheist, the sheer skeptic, the scoffer, the pantheist, the solipsist, and the freethinking libertine, the last figuring as no small nuisance to the serious unbeliever. So drastic is the criticism of orthodoxy that the book was unprintable in its day;[179] and it was little known even in manuscript. But ere long there appeared the Letter on the Blind, for the use of those who see (1749), in which a logical rebuttal alike of the ethical and the cosmological assumptions of theism, developed from hints in the Pensées, is put in the mouth of the blind English mathematician, Sanderson. It is not surprising that whereas the Pensées had been, with some other books, ordered by the Paris Parlement to be burnt by the common hangman, the Lettre sur les Aveugles led to his arrest and an imprisonment of six months[180] in the Château de Vincennes. Both books had of course been published without licence;[181] but the second book was more than a defiance of the censorship: it was a challenge alike to the philosophy and the faith of Christendom; and as such could not have missed denunciation.[182]

But Diderot was not the kind of man to be silenced by menaces. In the famous Sorbonne thesis of the Abbé de Prades (1751) he probably had, as we have seen, some share; and when De Prades was condemned and deprived of his licence (1752) Diderot wrote the third part of the Apologie (published by De Prades in Holland), which defended his positions; and possibly assisted in the other parts.[183] The hand of Diderot perhaps may be discovered in the skilful allusions to the skeptical Demonstratio Evangelica of Huet, which De Prades professes to have translated when at his seminary, seeking there the antidote to the poison of the deists. The entire handling of the question of pagan and Christian miracles, too, suggests the skilled dialectician, though it is substantially an adaptation of Leslie’s Short and Easy Method with the Deists. The alternate eulogy and criticism of Locke are likely to be his, as is indeed the abundant knowledge of English thought shown alike in the thesis and in the Apologie. Whether he wrote the passage which claims to rebut an argument in his own Pensées philosophiques[184] is surely doubtful. But his, certainly, is the further reply to the pastoral of the Jansenist Bishop of Auxerre against de Prades’s thesis, in which the perpetual disparagement of reason by Catholic theologians is denounced[185] as the most injurious of all procedures against religion. And his, probably, is the peroration[186] arraigning the Jansenists and imputing to their fanaticism and superstition, their miracle-mongering and their sectarian bitterness, the discredit which among thinking men had latterly fallen upon Church and creed alike.[187]

De Prades, who in his thesis and Apologie had always professed to be a believing Christian, was not a useful recruit to rationalism. Passing from Holland to Berlin, he was there appointed, through the influence of Voltaire, reader and amanuensis to the King,[188] who in 1754 arranged for him an official reconciliation with the Church. A formal retractation was sent to the Pope, the Sorbonne, and the Bishop of Montauban;[189] and Frederick in due course presented him to a Catholic canonry at Glogau. In 1757, however, he was put under arrest on the charge, it is commonly said, of supplying military information to his countrymen;[190] and thereafter, returning to France in 1759, he obtained a French benefice. Diderot, who was now a recognized champion of freethought, turned away with indignation.[191]

Thenceforward he never faltered on his path. It is his peculiar excellence to be an original and innovating thinker not only in philosophy but in psychology, in æsthetics, in ethics, in dramatic art; and his endless and miscellaneous labours in the Encyclopédie, of which he was the most loyal and devoted producer, represent an extraordinary range of interests. He suffered from his position as a hack writer and as a forced dissembler in his articles on religious matters; and there is probably a very real connection between his compulsory insincerities[192] in the Encyclopédie—to say nothing of the official prosecution of that and of others of his works—and his misdeeds in the way of indecent fiction. When organized society is made to figure as the heartless enemy of thinking men, it is no great wonder if they are careless at times about the effect of their writings on society. But it stands to his lasting honour that his sufferings at the hands of priests, printers, and parlements never soured his natural goodness of heart.[193] Having in his youth known a day’s unrelieved hunger, he made a vow that he would never refuse help to any human being; and, says his daughter, no vow was ever more faithfully kept. No one in trouble was ever turned away from his door; and even his enemies were helped when they were base enough to beg of him. It seems no exaggeration to say that the bulk of his life was given to helping other people; and the indirect effect of his work, which is rather intellectually disinterested than didactic, is no less liberative and humanitarian. “To do good, and to find truth,” were his mottoes for life.

His daughter, Madame de Vandeul, who in her old age remained tranquilly divided between the religion instilled into her by her pious mother and the rationalism she had gathered from her father and his friends, testified, then, to his constant goodness in the home;[194] and his father bore a similar testimony, contrasting him with his pious brother.[195] He was, in his way, as beneficent as Voltaire, without Voltaire’s faults of private malice; and his life’s work was a great ministry of light. It was Goethe who said of him in the next generation that “whoever holds him or his doings cheaply is a Philistine.” His large humanity reaches from the planes of expert thought to that of popular feeling; and while by his Letter on the Blind he could advance speculative psychology and pure philosophy, he could by his tale The Nun (La Religeuse,[196] written about 1760, published 1796) enlist the sympathies of the people against the rule of the Church. It belonged to his character to be generously appreciative of all excellence; he delighted in other men’s capacity as in pictures and poetry; and he loved to praise. At a time when Bacon and Hobbes were little regarded in England he made them newly famous throughout Europe by his praises. In him was realized Bacon’s saying, Admiratio semen scientiae, in every sense, for his curiosity was as keen as his sensibility.

25. With Diderot were specially associated, in different ways, D’Alembert, the mathematician, for some years his special colleague on the Encyclopédie, and Baron d’Holbach. The former, one of the staunchest friends of Voltaire, though a less invincible fighter than Diderot, counted for practical freethought by his miscellaneous articles, his little book on the Jesuits (1765), his Pensées philosophiques, his physics, and the general rationalism of his Preliminary Discourse to the Encyclopédie. It is noteworthy that in his intimate correspondence with Voltaire he never avows theism, and that his and Diderot’s friend, the atheist Damilaville, died in his arms.[197] On Dumarsais, too, he penned an éloge of which Voltaire wrote: “Dumarsais only begins to live since his death; you have given him existence and immortality.”[198] And perpetual secretary as he was of the Academy, the fanatical daughter of Madame Geoffrin could write to him in 1776: “For many years you have set all respectable people against you by your indecent and imprudent manner of speaking against religion.”[199] Baron d’Holbach, a naturalized German of large fortune, was on the other hand one of the most strenuous propagandists of freethought in his age. Personally no less beloved than Helvétius,[200] he gave his life and his fortune to the work of enlightening men on all the lines on which he felt they needed light. Much of the progress of the physical sciences in pre-revolutionary France was due to the long series—at least eleven in all—of his translations of solid treatises from the German; and his still longer series of original works and translations from the English in all branches of freethought—a really astonishing movement of intellectual energy despite the emotion attaching to the subject-matter—was for the most part prepared in the same essentially scientific temper. Of all the freethinkers of the period he had perhaps the largest range of practical erudition;[201] and he drew upon it with unhasting and unresting industry. Imitating the tactic of Voltaire, he produced, with some assistance from Diderot, Naigeon, and others, a small library of anti-Christian treatises under a variety of pseudonyms;[202] and his principal work, the famous System of Nature (1770), was put out under the name of Mirabaud, an actual person, then dead. Summing up as it does with stringent force the whole anti-theological propaganda of the age, it has been described as a “thundering engine of revolt and destruction.”[203] It was the first published atheistic[204] treatise of a systematic kind, if we except that of Robinet, issued some years before; and it significantly marks the era of modern freethought, as does the powerful Essai sur les préjugés, published in the same year,[205] by its stern impeachment of the sins of monarchy—here carrying on the note struck by Jean Meslier in his manuscript of half-a-century earlier. Rather a practical argument than a dispassionate philosophic research, its polemic against human folly laid it open to the regulation retort that on its own necessarian principles no such polemic was admissible. That retort is, of course, ultimately invalid when the denunciation is resolved into demonstration. If, however, it be termed “shallow” on the score of its censorious treatment of the past,[206] the term will have to be applied to the Hebrew books, to the Gospel Jesus, to the Christian Fathers, to Pascal, Milton, Carlyle, Ruskin, and a good many other prophets, ancient and modern. The synthesis of the book is really emotional rather than philosophic, and hortatory rather than scientific; and it was all the more influential on that account. To the sensation it produced is to be ascribed the edict of 1770 condemning a whole shelf of previous works to be burnt along with it by the common hangman.

26. The death of d’Holbach (1789) brings us to the French Revolution. By that time all the great freethinking propagandists and non-combatant deists of the Voltairean group were gone, save Condorcet. Voltaire and Rousseau had died in 1778, Helvétius in 1771, Turgot in 1781, D’Alembert in 1783, Diderot in 1784. After all their labours, only the educated minority, broadly speaking, had been made freethinkers; and of these, despite the vogue of the System of Nature, only a minority were atheists. Deism prevailed, as we have seen, among the foremost revolutionists; but atheism was relatively rare. Voltaire, indeed, impressed by the number of cultured men of his acquaintance who avowed it, latterly speaks[207] of them as very numerous; and Grimm must have had a good many among the subscribers to his correspondence, to permit of his penning or passing the atheistic criticism there given of Voltaire’s first reply to d’Holbach. Nevertheless, there was no continuous atheistic movement; and after 1789 the new freethinking works run to critical and ethical attack on the Christian system rather than on theism. Volney combined both lines of attack in his famous Ruins of Empires (1791); and the learned Dupuis, in his voluminous Origin of all Cults (1795), took an important step, not yet fully reckoned with by later mythologists, towards the mythological analysis of the gospel narrative. After these vigorous performances, the popular progress of French freethought was for long practically suspended[208] by the tumult of the Revolution and the reaction which followed it, though Laplace went on his way with his epoch-making theory of the origin of the solar system, for which, as he told Napoleon, he had “no need of the hypothesis” of a God. The admirable Condorcet had died, perhaps by his own hand, in 1794, when in hiding from the Terrorists, leaving behind him his Esquisse d’un tableau historique des progrès de l’esprit humain, in which the most sanguine convictions of the rationalistic school are reformulated without a trace of bitterness or of despair.

27. No part of the history of freethought has been more distorted than that at which it is embroiled in the French Revolution. The conventional view in England still is that the Revolution was the work of deists and atheists, but chiefly of the latter; that they suppressed Christianity and set up a worship of a Goddess of Reason, represented by a woman of the town; and that the bloodshed of the Terror represented the application of their principles to government, or at least the political result of the withdrawal of religious checks.[209] Those who remember in the briefest summary the records of massacre connected with the affirmation of religious beliefs—the internecine wars of Christian sects under the Roman Empire; the vast slaughters of Manichæans in the East; the bloodshed of the period of propagation in Northern Europe, from Charlemagne onwards; the story of the Crusades, in which nine millions of human beings are estimated to have been destroyed; the generation of wholesale murder of the heretics of Languedoc by the papacy; the protracted savageries of the Hussite War; the early holocaust of Protestant heretics in France; the massacres of German peasants and Anabaptists; the reciprocal persecutions in England; the civil strifes of sectaries in Switzerland; the ferocious wars of the French Huguenots and the League; the long-drawn agony of the war of thirty years in Germany; the annihilation of myriads of Mexicans and Peruvians by the conquering Spaniards in the name of the Cross—those who recall these things need spend no time over the proposition that rationalism stands for a removal of restraints on bloodshed. But it is necessary to put concisely the facts as against the legend in the case of the French Revolution.

(a) That many of the leading men among the revolutionists were deists is true; and the fact goes to prove that it was chiefly the men of ability in France who rejected Christianity. Of a number of these the normal attitude was represented in the work of Necker, Sur l’importance des idées religieuses (1787), which repudiated the destructive attitude of the few, and may be described as an utterance of pious theism or Unitarianism.[210] Orthodox he cannot well have been, since, like his wife, he was the friend of Voltaire.[211] But the majority of the Constituent Assembly was never even deistic; it professed itself cordially Catholic;[212] and the atheists there might be counted on the fingers of one hand.[213]

The Abbé Bergier, in answering d’Holbach (Examen du Matérialisme, ii, ch. i, § 1), denies that there has been any wide spread of atheistic opinion. This is much more probable than the statement of the Archbishop of Toulouse, on a deputation to the king in 1775, that “le monstrueux athéisme est devenu l’opinion dominante” (Soulavie, Règne de Louis XVI, iii, 16; cited by Buckle, 1-vol. ed. p. 488, note). Joseph Droz, a monarchist and a Christian, writing under Louis Philippe, sums up that “the atheists formed only a small number of adepts” (Histoire du Règne de Louis XVI, éd. 1839, p. 42). And Rivarol, who at the time of writing his Lettres à M. Necker was substantially an atheist, says in so many words that, while Rousseau’s “Confession of a Savoyard Vicar” was naturally very attractive to many, such a book as the “Système de la Nature,” were it as attractive as it is tedious, would win nobody” (Œuvres, éd. 1852, p. 134). Still, it ran into seven editions between 1770 and 1780.