If Locke was the most influential philosopher in the swirling debates of fin de siècle Holland, the most prolific writer and educator was Pierre Bayle, whom Voltaire called “the first of the skeptical philosophers.” He might also be called the first of the encyclopaedists, for he was more publicist than philosopher, eclectic in his interests, information, and ideas. The title Nouvelles de la république des lettres (1684–87) conveys the method and ideal of this superior form of journalism. Bayle’s Historical Dictionary (1697) exposed the fallacies and deceits of the past by the plausible method of biographical articles. “The grounds of doubting are themselves doubtful; we must therefore doubt whether we ought to doubt.” Lacking a sound criterion of truth or a system by which evidence could be tested but hating dogma and mistrusting authority, Bayle was concerned with the present state of knowledge. He may have been as much concerned with exposing the limitations of human reason as with attacking superstition. Translated and abridged, as, for example, by order of Frederick II of Prussia, the Dictionary became the skeptic’s bible. The effect of Bayle’s work and that of others less scrupulous, pouring from the presses of the Netherlands and Rhineland and easily penetrating French censorship, could not fail to be broadly subversive.

Bayle’s seminal role in the cultural exchange of his time points to the importance of the Dutch Republic in the 17th century. Because Holland contributed little to science, philosophy, or even art at the time of the philosophes, though enviable enough in the tranquil lives of many of its citizens, its golden 17th century tends to be overlooked in traditional accounts of the Enlightenment. Wealth derived from trade, shipping, and finance and the toleration that attracted Sephardic Jews, Protestants from Flanders and France, and other refugees or simply those who sought a relatively open society combined to create a climate singularly favourable to enterprise and creativity. It was urban, centring on Amsterdam, and it was characterized by a rich artistic life created by painters who worked to please patrons who shared their values. It was pervaded by a scientific spirit. Pieter de Hooch’s search for new ways of portraying light, Spinoza’s pursuit of a rational system that would comprehend all spiritual truth. Antony van Leeuwenhoek’s use of the microscope to reveal the hidden and minute, Hermann Boerhaave’s dissection of the human corpse, Jan Blaeuw’s accuracy in the making of maps or Huygens’ in the new pendulum clock—each represents that passion for discovery that put 17th-century Holland in a central position between the Renaissance and the Enlightenment, with some of the creative traits of both periods. Its spirit is epitomized in the university of Leiden, which attracted students from throughout Europe by its excellence in medicine and law and its relative freedom from ecclesiastical authority.

It was fitting, therefore, that much of the writing that helped form the Enlightenment emanated from the printing presses of the Huguenot emigré Louis Elsevier at Amsterdam and Leiden. Bayle’s skepticism belongs to the time when dust was still rising from the collapsing structures of the past, obscuring such patterns of thought as would eventually emerge. There was no lack of material for them. Not only did learning flourish in the cultural common market that served the needs of those who led or followed intellectual fashions; also important, though harder to measure, was the influence of the new relativism, grounded in observable facts about an ever-widening world. It was corrosive alike of Cartesian method, classical regulation, and traditional theology. Of Descartes, Huygens had written that he had substituted for old ideas “causes for which one can comprehend all that there is in nature.”

Allied to that confidence in the power of reason was a prejudice against knowledge that might distort argument. Blaise Pascal had perfectly exemplified that rationalist frame of mind prone to introspection, which in his case—that of mathematical genius and literary sensibility in rare combination—produced some of the finest writing of his day. But the author of the Pensées (1669) was reluctant to travel: “All the ills that affect a man proceed from one cause, namely that he has not learned to sit quietly and contentedly in one room.” Again, the object of the protagonists of the prevailing classicism had been to establish rules: for language (the main role of the Académie), for painting (as in the work of Nicolas Poussin), even for the theatre, where Jean Racine’s plays of heightened feeling and pure conflict of ideal or personality gain effect by being constrained within the framework of their Greek archetypes.