At the First International Congress of Philosophy, which was held in Paris, during the first five days of August, 1900, Bergson read a short, but important, paper, Sur les origines psychologiques de notre croyance a la loi de causalite. In 1901 Felix Alcan published in book form a work which had just previously appeared in the Revue de Paris entitled Le Rire, one of the most important of his minor productions. This essay on the meaning of the Comic was based on a lecture which he had given in his early days in the Auvergne. The study of it is essential to an understanding of Bergson's views of life, and its passages dealing with the place of the artistic in life are valuable. In 1901 he was elected to the Academie des Sciences morales et politiques, and became a member of the Institute. In 1903 he contributed to the Revue de metaphysique et de morale a very important essay entitled Introduction a la metaphysique, which is useful as a preface to the study of his three large books.
On the death of Gabriel Tarde, the eminent sociologist, in 1904, Bergson succeeded him in the Chair of Modern Philosophy. From the 4th to the 8th of September of that year he was at Geneva attending the Second International Congress of Philosophy, when he lectured on Le Paralogisme psycho-physiologique, or, to quote its new title, Le Cerveau et la Pensee: une illusion philosophique. An illness prevented his visiting Germany to attend the Third Congress held at Heidelberg.
His third large work--his greatest book--L'Evolution creatrice, appeared in 1907, and is undoubtedly, of all his works, the one which is most widely known and most discussed. It constitutes one of the most profound and original contributions to the philosophical consideration of the theory of Evolution. Un livre comme L'Evolution creatrice, remarks Imbart de la Tour, n'est pas seulment une oeuvre, mais une date, celle d'une direction nouvelle imprimee a la pensee. By 1918, Alcan, the publisher, had issued twenty-one editions, making an average of two editions per annum for ten years. Since the appearance of this book, Bergson's popularity has increased enormously, not only in academic circles, but among the general reading public.