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[Introduction de 1950]
"The Vienna Circle constituted (together with the society for empirical philosophy in Berlin) a point of departure for an international philosophical movement which led to a rebirth and reformation of positivism and empiricism. Neo-positivism stands in the foreground of contemporary philosophy, especially in the anglo-saxon and scandinavian countries. It may safely be said to be the most significant of serious philosophical movements in the period between the two world-wars. But it is just in the German cultural domain that the work of the Vienna Circle has been unconditionally rejected—if it has been at all taken notice of. Indeed, acquaintance with the work of the Vienna Circle has been and still is very scant in Germany. It is but the beginnings that are known. This is evidenced by the fact that Gerhart Lehmann, in his history of “Contemporary German Philosophy”, which was published as recently as 1943, mentions only Carnap, and gives, indeed, an enumeration of his early writings, his doctoral dissertation, his essay on “Eigentliche und uneigentliche Begriffe” of 1927, his “Logische Aufbau der Welt” and the “Scheinprobleme” of 1928 as well as the “Grundriss der Logistik” of 1929, but fails to mention any of his later publications, which are of such importance. And even the works referred to are entirely misinterpreted, their main points being missed entirely. Likewise Del Negro, whose “Geschichte der deutschen Philosophie der Gegenwart” appeared but one year earlier, still refers to the “Logische Aufbau” as the most important publication of the school. None of the numerous publications which came out subsequently, the articles in the eight volumes of “Erkenntnis”, Carnap’s “Logical Syntax of Language”, Schlick’s “Gesammelte Aufsaetze”, documenting the development and progress of the Vienna Circle, were taken notice of. These publications, and in fact the entire movement, were afterwards played down and suppressed in the intellectual climate of national socialism. Even in the recent survey of “Contemporary European Philosophy” by Bochenski (1947), which is a good book on the whole and contains a far better discussion of neo-positivism and the Vienna Circle than the above mentioned books, there are slight inadequacies and the discussion is all too brief.
More thorough analyses of the work of the Vienna Circle are to be found mainly in writings outside of Germany. We have here above all the large expert monograph by J. R. Weinberg “An Examination of Logical Positivism”, London, 1936, which nevertheless refers primarily to the earlier phase, dominated by Wittgenstein. A penetrating analysis is further contained in the excellent discussion of neo-positivism by G. H. von Wright, “Den logiska Empirismen”, Helsingfors, 1943; but as it is written in Swedish."
"The days of the Vienna Circle are gone—at least in Vienna. Its work, in which I myself participated, is finished, and that is why my exposition extends only to the time of the Circle’s dissolution, in 1938. Indeed, it would have been impossible anyway to keep sufficiently informed of publications abroad by former members of the Circle as well as publications referring to the Vienna Circle which have come out in the meantime, considering the state of isolation from foreign countries which the second world war brought with itself. Hence it was not possible to take such recent literature into account, Carnap’s recent works excepted."
[Partie 1 : L'histoire du cercle de Vienne]
"THE UNIVERSITY OF VIENNA has had a chair for philosophy of the inductive sciences since 1895 ; it was first instituted for Ernst Mach who held it until 1901. After him it was taken over by L. Boltzmann (from 1902 until 1906), and still later Adolf Stoehr, the original thinker, occupied it. Thus there has existed a long tradition of empiricist philosophy in Vienna, concerned primarily with the natural sciences. But even before that time empiricist tendencies had in a sense asserted themselves through Franz Brentano. Theodor Gomperz and jodl had represented anti-metaphysical philosophy, and in 1922 the chair for philosophy of the inductive sciences was offered to Moritz Schlick. He had, not unlike his predecessors, come to philosophy from physics. His doctoral dissertation, written under Planck, was on the topic of light-reflection in non-homogeneous media, and through his monograph “Space and Time in Contemporary Physics”, 1917, he became the first philosophical interpreter of the theory of relativity. He entertained personal contacts with leading men in the exact sciences, such as Planck, Einstein and Hilbert. But what distinguished him from his predecessors, Mach as well as Boltzmann, was his intimate knowledge of philosophy.
Soon a circle formed itself around Schlick in Vienna, consisting not only of students but also of intellectuals interested in philosophy. It contained the most advanced students of his—among them Fr. Waismann was outstanding—, but also accomplished Ph.D.’s, like Neurath, E. Zilsel, H. Feigl, B. v. Juhos, H. Neider, further some of his closer or remoter colleagues, viz. lecturers R. Carnap, V. Kraft, F. Kaufmann, and by no means just “pure” philosophers, but likewise philosophically interested mathematicians: Professor H. Hahn and lecturers Menger, Radakovic and Goedel. The indicated composition of the circle was responsible for an unusually high level of discussion. The mathematical representation—Carnap, Waismann, Zilsel, Neurath, Kaufmann too were mathematically competent—reinforced the tendency towards logical rigor and precision. In shorter and longer meetings logical and epistemological problems were discussed, and thanks to the background and original analyses of the leading participants—primarily Schlick, Carnap, Neurath, Waismann, Hahn, Zilsel—a good many positive results were achieved. What went on was cooperative, constructive analysis, not mere reception of a teacher’s doctrines. Schlick was by no means the one and only leading figure. Many influential suggestions came from Wittgenstein, though the latter was never personally present. They were transmitted by Schlick and Waismann who were in personal contact with Wittgenstein, at that time in Vienna. Thus Wittgenstein’s influence extended far beyond the influence exercised by his Tractatus Logico-Phidosophicus. The cooperative work of the Vienna Circle resulted in such rapid progress as usually occurs only in the special sciences. Naturally, such a rapid development involved repeated changes of views, and it was to be expected that several of the original, oversimplified doctrines would in time be superseded.
In 1929 Schlick was called to Bonn, but after some hesitation he refused. In the spring and summer of the same year he went to Stanford University, California, as visiting professor. It was during this period when they faced first the possibility of losing him and then his prolonged absence, that the members of the Circle became conscious of the fact that they formed an intellectual community sui generis, an independent philosophical group. The meeting of the German Physical Society and the German Mathematical Association, at Prague in the middle of September of the same year, was the external occasion for presenting themselves as an independent group organizing concurrently a congress for epistemology of the exact sciences, jointly with the society for empirical philosophy in Berlin, with such members as Fr. Kraus, H. Reichenbach, A. Herzberg, A. v. Parseval, W. Dubislav, K. Grelling. At the same time a small programmatic pamphlet “Wissenschaftliche Weltauffassung. Der Wiener Kreis” was published, written by Carnap, Hahn and Neurath; it briefly described the history and membership, the orientation and the goals of the circle. The pamphlet was dedicated to Schlick and handed to him when he returned to Vienna in October 1929, “as an expression of gratitude and joy over his return to Vienna”, as it said expressly in the preface. Thus the “Vienna Circle” entered publicity.
This new phase also manifested itself in the Circle’s adoption of a special organ of publication: the periodical “Annalen der Philosophie” was taken over in 1930 by Carnap and Reichenbach and continued under the name “Erkenntnis”. The Circle found a further means of publication in the small monographs “Veroeffentlichun-gen des Vereines Ernst Mach”, edited by the society “Ernst Mach” which was founded in 1928 by several members of the Circle with a tendency towards popularisation [...]
From then on the “Vienna Circle” became rapidly known to an ever expanding public. In September 1930 they organized, again jointly with the Berlin group for empirical philosophy, a congress for epistemology of the exact sciences at Koenigsberg, in connection with the German congress of physicists and mathematicians; the topic was foundation problems in mathematics and quantum-mechanics.
Carnap’s invitation to the faculty of natural science at the University of Prague, as assistant professor, meant indeed a distinct loss for the Vienna Circle ; however, Carnap now formed together with Philip Frank, the professor of physics, a branch of the “Vienna Circle” in Prague. Both groups made contacts with congenial thinkers abroad, with Joergensen, professor of philosophy at Copenhagen, with Rougier, at that time professor at Besançon and Kairo, with Morris, university professor at Chicago, with Miss Stebbing, university professor in London, and others. Personal intercourse was also established with the logistic schools in Warsaw and Lemberg. Out of all these contacts grew an international congress of scientific philosophy, organized in 1934 at a preliminary meeting in Prague by Rougier, Reichenbach, Carnap, Frank and Neurath, and staged in September 1935 at Paris in the halls of the Sorbonne. The congress was promoted by the French government and by international scientific institutes in Paris; Russell and Enriques made opening speeches, and about 170 members from more than 20 countries participated; from Germany only Professor Scholz, Muenster, was present besides the Berlin group. It was a great success. If the Vienna Circle’s outlook still met vehement opposition at the Prague meeting of 1929, it was now largely shared. Enriques and General Vouillemin only cautioned against dogmatism and neo-scholasticism, Morris against onesidedness and Reichenbach against the tendency to condemn something as metaphysics prematurely; some members were critical of some specific views. Upon a suggestion of Carnap’s a committee for international unification of logical symbolism, first for the German terminology, was formed; the congress also declared its readiness to promote and cooperate with the international encyclopedia of unified science, recommended by Neurath.
Immediately the following year, in July 1936, a second international congress “for unity of science” was held in Copenhagen, dedicated especially to the problem of causality, with particular attention to quantum-physics and biology. Close to 100 members, from most European countries and especially many from the United States, participated; N. Bohr gave the first paper. In his address, Joergensen emphasized that the initiative for this and the preceding congresses had come from the “Vienna Circle”, and that the fundamental ideas of the new philosophical movement must be credited to the latter. The following year, in July 1937, a third congress for unity of science was held again in Paris, at the Sorbonne, for the purpose of discussing the planned encyclopedia. And again a year later, in July 1938, a fourth congress for unity of science took place at Cambridge, dealing with the language of science. G. E. Moore gave the opening address, and the attendance was again international. The last of these congresses was held in the United States, in September 1939, at Cambridge, Massachusetts. Then the war put an end to them. It was a splendid rise. The Vienna Circle had turned into an international philosophical movement, into Neo-Positivism or Neo-Empiricism.
But in the meantime the Vienna Circle itself had suffered painful losses. In 1931 Feigl accepted a professorship at the University of Iowa, and was subsequently called to the University of Minnesota. In 1934 Professor Hahn died unexpectedly. In 1936 Carnap, having been awarded an honorary doctor’s degree by Harvard University, went to the United States where he accepted a position at the University of Chicago. And during the same year the Circle was dealt its heaviest blow: Professor Schlick was shot at the University by a mentally deranged former student. It was a loss beyond repair, to have Schlick thus torn away from his fruitful work and to have his further development cut off, with a good many projects left behind unfinished. Now the meetings of the Circle were discontinued, and after the forced annexation of Austria by Germany in 1938 the organization dissolved completely. Its members were dissipated into all parts of the world. Waismann and Neurath went to England, where Waismann became a university professor, first at Cambridge and then at Oxford, and where Neurath died in 1946 ; Zilsel and Kaufmann went to the United States where Zilsel died in 1943 ; Menger and Goedel had already followed up invitations to that country. “Erkenntnis” moved in 1938 from Leipzig to den Haag, where it assumed in volume 8 the title “The Journal of Unified Science (Erkenntnis) ”, but had to discontinue publication, in 1940, because of the war. The sale of publications by the Vienna Circle was prohibited, for political reasons, because there were some Jews among its members and because the activity of the society “Ernst Mach” was regarded as “subversive”.
There was no more Vienna Circle in Vienna. But its viewpoint was represented abroad where it gained more and more ground; above all in the United States where there existed already a parallel movement, represented by Morris, Langford, Lewis, Bridgman, Nagel, where Reichenbach and R. v. Mises have found a home, and where at the present time Carnap in Chicago and Feigl in Minnesota, Bergmann in Iowa and Hempel at Yale University continue the work. In England, the country where, after all, Russell dwells as an ancestor of the entire movement, the Vienna Circle is perpetuated through Waismann at Oxford and through Ayer—as well as through Popper, in essentials—at the University of London; at the same university Miss Stebbing (deceased 1943) represented a similar point of view. Dr. Popper, it is true, never participated in the meetings of the Vienna Circle, but he stood in personal intellectual contact with several members (Carnap, Feigl, Kraft). The work of the Vienna Circle has been continued in a most remarkable way in Finland, through Kaila, who like Ayer had for some time personally participated in the Circle’s evening sessions, and through G. H. v. Wright, Kaila’s former student and colleague at the University of Helsinki, now Professor at Cambridge. Dr. H. A. Lindemann, also a member of the Vienna Circle, returned to Buenos Aires where he had been living before, and where he now exercises his literary activity. Dr. Tscha Hung, who also was a member of the Vienna Circle, is now professor at the University of Peiping, before at the University of Wuhan, Wuchang, China. Naturally, the erstwhile members of the Vienna Circle have not stayed on their platform but have developed further and in part superseded their original views.
Philosophers close to the Vienna Circle are also Professor Joergensen in Copenhagen and Professor Dürr in Zurich, Professor Rougier, General Vouillemin, M. Boll and others in France. Connections with the Vienna Circle have been established also in places where at least partly similar ideas dominate, such as the empiricist school in Uppsala and Professor Tegen at Lund, the logistic schools at Goettingen and Muenster, at Warsaw and Lemberg ; the latter two, however, have been dissolved by the war just like the Vienna Circle.
In Germany alone the ideas of the Vienna Circle have not been propagated. While Russell, for example, mixes his criticism with genuine admiration, and even more critical people have not denied the significance of these ideas, they have here, if not completely ignored, been repudiated firmly and contemptuously. In the essay “L’ecole de Vienne et la philosophie traditionelle”, Schlick writes of the complaints against the Vienna Circle: “Frequently the Vienna School is accused of consisting, not of philosophers, but of enemies of philosophy. The teachings of this school, they say, contribute nothing to the development and progress of philosophy, but on the contrary to its dissolution”. But one could not talk that way unless one equated philosophy with metaphysics. Yet, surely the rejection of metaphysics is not original with the Vienna Circle. The understanding words which Schlick finds, in the same essay, for historical philosophy prove that the accusation of contempt for philosophy is unfounded: “The ‘anti-metaphysicians’ are often unjust to traditional philosophy when they declare that the latter is nothing but a collection of pseudo-problems. I think, on the contrary, that we have every reason to be proud of the fact that our ideas are the result of a long historical development of the human mind”. “We shall show historical understanding for the systems of the past, their dogmas do not irritate us any more; we may admire with a clear conscience the grand epochs of a human species which exhibits a profound drive towards truth, in its inquiries and in its errors alike”. One should not judge the Vienna Circle’s attitude towards traditional philosophy by the expressions of its radical members alone. Indeed, he for whom philosophy is the expression of individual wisdom about life and world, a subjective interpretation of life and the world or for whom it is the search for the speculative construction of an explanation, concealed and unknowable outside of philosophy, of the world, or for a sort of conceptual world-poetry—he, indeed, cannot but look upon philosophy as interpreted by the Vienna Circle as an impoverishment. For it excludes everything that is not attainable by scientific method. But in this way alone is it possible to get beyond its subjective diversity and instability, in this way alone can we expect to reach universal validity and lasting results."
-Victor Kraft, The Vienna Circle. The origins of neo-positivism, New York, Philosophical Library, 1953.
