The Vienna Circle (1920s–1930s) — Logical Empiricism and the "Overcoming of Metaphysics"
This text is a preview of History of the Reception of Hegel, volume I, to be published in 2026 by Reflexivity Press.
The Vienna Circle around Moritz Schlick and Rudolf Carnap developed the most systematic and influential positivist critique of metaphysics of the twentieth century. What began with Comte as a thesis in the philosophy of history and became with Mach an epistemological position, the logical empiricists radicalized into a linguistic-analytic method. Their program of “overcoming metaphysics through logical analysis of language” was directed explicitly against Hegel as the prime example of metaphysical meaninglessness.
Origins and Intellectual Context
The Vienna Circle formed from 1924 onward around Moritz Schlick, who in 1922 had taken over the chair of philosophy of the inductive sciences at the University of Vienna. Its core members included Rudolf Carnap, Otto Neurath, Friedrich Waismann, Herbert Feigl, and Kurt Gödel (who, however, maintained a critical distance).[1]
The intellectual climate was shaped by three developments:
1. The logical revolution: Frege, Russell, and Whitehead had, with mathematical logic, created a precise instrument for analyzing conceptual structures. The Principia Mathematica (1910–1913) showed that mathematics is reducible to logic. This logic was now to serve as a tool of philosophy.
2. Einstein’s theory of relativity: The revolutionizing of physics showed that seemingly “a priori certain” assumptions (absolute time, Euclidean geometry) could be empirically refuted. This strengthened the empiricist position: even fundamental principles must be empirically testable.
3. Wittgenstein’s Tractatus: Ludwig Wittgenstein’s Tractatus Logico-Philosophicus (1921) provided a linguistic-philosophical foundation that the Vienna Circle (in part misleadingly) interpreted as a manifesto of logical empiricism. The famous closing thesis, “Whereof one cannot speak, thereof one must be silent,” became a motto against metaphysics.[2]
The Verification Principle as a Demarcation Criterion
The core principle of the Vienna Circle was the verification principle: a statement is meaningful only if it is either (a) analytically true through logical or mathematical definitions, or (b) empirically verifiable through observation.[3]
This principle divided all statements into three classes:
1. Analytic statements (logically or mathematically true): “All bachelors are unmarried” or “2+2=4.” These are necessarily true but empty of content—they merely explicate the meaning of the concepts used, but say nothing about the world.
2. Synthetic, empirically verifiable statements: “It is raining in Vienna” or “Water boils at 100°C.” These are contingent (they could also be false), but substantive—they make claims about the world that can be tested through observation.
3. Metaphysical pseudo-statements: all statements that are neither analytic nor empirically verifiable are meaningless. They look like statements, but are only grammatically correct sequences of words without meaning.
Carnap’s “Overcoming of Metaphysics” — Hegel as Chief Adversary
Rudolf Carnap formulated the most radical critique of Hegel in his famous 1931 essay “The Elimination of Metaphysics through Logical Analysis of Language.”[4]
Carnap’s method was linguistic: he analyzed concrete metaphysical statements and showed that they violate the rules of meaningful language use. He chose Heidegger (“The nothing nothings”) as his main example, but Hegel was the implicit chief adversary.
Carnap’s critique of Hegel concentrated on three points:
1. Pseudo-concepts without empirical content: concepts like “the Absolute,” “the World Spirit,” “the in-itself” have no empirical anchoring. There is no observation that could show what these concepts denote. They are therefore not concepts, but empty formulas.
2. Pseudo-statements without truth value: Hegelian sentences like “Pure being and pure nothing are the same” look like statements, but are logically defective. They can be neither true nor false, because their components have no meaning. They are grammatically correct but semantically empty—“pseudo-statements.”
3. The confusion of expressive and representative function: metaphysical texts express a “feeling for life” (like music or poetry), but present themselves as theoretical knowledge. Hegel systematically confuses the emotional effect of his formulations with their cognitive content.
Carnap cites as an example a sentence from Hegel’s Science of Logic:
“Pure being makes the beginning, because it is both pure thought and the undetermined, simple immediate, and the first beginning cannot be anything mediated or further determined.”[5]
Carnap’s analysis: this sentence is a string of words which, taken individually, might perhaps have meaning, but in this combination yield no verifiable sense. “Pure thought”—what observation would show that something is a “pure” (and not an “impure”) thought? “Undetermined immediate”—how would one empirically ascertain whether something is “undetermined”?
Schlick’s Epistemological Foundation
Moritz Schlick, the philosophical head of the Circle, developed the epistemological foundation. In General Theory of Knowledge (1918, revised 1925) and in essays such as “Meaning and Verification” (1936), he argued that meaning and the method of verification are identical.[6]
Schlick’s argument: if we understand the meaning of a statement, we must know under what circumstances it would be true or false. These circumstances are the empirical conditions of its verification. A statement for which we cannot specify verification conditions is therefore meaningless.
Applied to Hegel: Hegel’s statements about “the Absolute,” “the absolute idea,” or “the self-knowing concept” cannot be verified. There is no empirical situation in which we could ascertain: “Yes, here the Absolute manifests itself” or “No, not here.” Hence these statements are meaningless.
The Systematic Limits of Logical Empiricism
The critique of the Vienna Circle proved self-refuting. Three fundamental problems became apparent:
1. The verification principle is itself not verifiable: the principle “only empirically verifiable statements are meaningful” is itself neither analytic nor empirically verifiable. It is a metaphysical thesis about the conditions of meaningfulness—exactly what it wants to prohibit. Carl Hempel formulated this problem as “The Verifiability Criterion of Meaning” as early as 1950.[7]
2. The analytic/synthetic dichotomy is untenable: W.V.O. Quine’s famous essay “Two Dogmas of Empiricism” (1951) showed that the strict separation of analytic and synthetic statements cannot be sustained. All statements are embedded in a “web of belief” and can in principle be revised—even seemingly analytic truths.[8]
3. The holistic structure of theory formation: scientific theories are not verified sentence by sentence, but tested as wholes against experience. Individual theoretical terms (like “electron” or “gravitational field”) are not directly verifiable, but legitimate as part of successful theories. The sharp distinction between “meaningful” and “meaningless” is too crude.
The Missed Critique of Hegel
The critique of the Vienna Circle hit a caricature of Hegel that overlooked the methodological dimension of his logic:
1. Hegel’s logic is not a metaphysics of the in-itself: as the interpretation developed here shows, Hegel does not understand logic as the ontology of an Absolute existing independently of thought, but as an explication of the structures of rational practice. The “categories” are forms in which experience structures itself, not entities beyond experience.
2. The “dialectical movement” is not mystical self-unfolding: Hegel’s thesis that concepts pass over “in themselves” into their opposites is not a metaphysical claim, but a methodical reflection on the immanent contradictions that show themselves when we think a concept through consistently. The “movement” is the movement of our thinking, which discovers and resolves inconsistencies.
3. Logic as reconstruction of our practice: Hegel’s logic is not an empirical theory about the world in the sense of a natural science, but neither is it a transcendental condition “prior to all experience.” Rather, it reconstructs what we always already do when we think about the world. The implicit starting point is our context of action, made up of thinking and acting in the world, and our experience in doing so.
That is why, naturally, the standard against which the logic can be measured is whether it actually describes our thinking and our search for truth and helps us, through recognizing this, and whether it can be intersubjectively traced in thought. That is where the inner development of the presentation finds its motivation, and that is the standard by which it can be measured—and further developed, should contradictions, limits, oversights, or even errors show themselves.
The categories of logic are not entities beyond experience that would need to be empirically verified, but neither are they a priori structures independent of all experience. They are the forms in which rational practice structures itself. The “resistance of experience”[9] is a constitutive moment of logic, not an external disturbance.
Against Carnap’s claim that Hegelian sentences have “no meaning” stands the impressive reality: the glossary to the logic commentary shows systematically that every one of Hegel’s terms has a precise meaning—albeit not one that is exhausted in simple empirical observations. Likewise, Hegel explicitly describes precisely the relation between the words “also” and “precisely” in sentences (in his doctrine of the subjective concept, the doctrine of judgment).
The demand for empirical verification thus hits a caricature of Hegel. The right question would be: does Hegel’s logic capture the structures of rational practice? Does it enable better understanding? Does it lead to productive insights? It is by these criteria—not by direct empirical verification of individual sentences—that it must be judged.
The Legitimate Demand for Precision
Despite its missed critique of Hegel, the Vienna Circle grasped a legitimate demand: conceptual clarity and methodological precision. Philosophy cannot simply remain in dark intimations, but must clarify its concepts and make its arguments explicit.
This demand is found—contrary to the Vienna Circle’s polemic—already in Hegel’s systematic procedure. The Science of Logic is a model of methodical exactness: every transition is grounded, every category is shown in its necessity, every inconsistency is uncovered and resolved.
The reconstruction of Hegel developed here takes the demand for precision seriously: the performative method, the four basic operations, the nine ethical criteria are attempts to explicate Hegel’s insights so that their logical structure becomes traceable. This is not a task carried out against Hegel, but in the spirit of his own method.
Historical Impact and Systematic Limits — From Dissolution to Transformation
The Violent End: Terror and Emigration
The Vienna Circle was not dissolved by philosophical arguments, but destroyed by political violence. Moritz Schlick was murdered on June 22, 1936, by a former student on the philosophers’ staircase of the University of Vienna—an assassination carried out in the heated climate of rising fascism, and one that was in part welcomed by right-wing circles.[10]
The National Socialist seizure of power in Austria (1938) forced the emigration of most members. Rudolf Carnap had already emigrated to Chicago in 1935. Otto Neurath fled via the Netherlands to England. Herbert Feigl, Carl Gustav Hempel, Hans Reichenbach, and others found refuge in the United States. Only a few survived in Europe—many under precarious conditions, some in hiding.
This dispersal had paradoxical consequences: the Vienna Circle as an institution was destroyed, but its ideas spread worldwide. The émigrés fundamentally shaped postwar analytic philosophy in the United States—Harvard, Princeton, Chicago, Berkeley became centers of logical empiricism. What had begun in Vienna as a local movement became the dominant current of Anglo-American philosophy.
The Inner Dissolution: Self-Critique and Transformation
But the emigration coincided in time with an inner dissolution of the original program. The radical theses of early logical empiricism proved untenable—and not primarily through external critique, but through immanent problems:
1. The verification principle refutes itself: the principle “a statement is meaningful only if it is empirically verifiable” is itself not empirically verifiable. It is a philosophical thesis that, by its own criteria, would have to be meaningless. The “scientific world-conception” could not justify its own foundations.[11]
2. The protocol-sentence debate led into aporia: the reduction of all statements to protocol sentences proved unworkable. Carnap, Neurath, and Schlick could not agree on what protocol sentences even were. The sought-after secure basis of knowledge remained an unattained ideal.
3. The analytic-synthetic dichotomy proved questionable: Quine’s “Two Dogmas of Empiricism” (1951) showed that the sharp separation of analytic (conceptually true) and synthetic (empirically true) statements cannot be sustained. Even seemingly purely logical truths have empirical implications.[12]
4. The theory-ladenness of observation: Hanson, Kuhn, and Feyerabend showed that there is no “pure” observation. Every observation is already theory-laden. The separation of observation language and theoretical language is artificial.
5. The historical dimension of science: Kuhn’s Structure of Scientific Revolutions (1962) demonstrated that scientific development does not occur through cumulative verification, but through paradigmatic upheavals. The separation of the “context of discovery” and the “context of justification” missed the historical reality of science.[13]
This self-dissolution was not mere capitulation, but a productive transformation. Carnap, Neurath, and others increasingly modified their positions—weakening theses, differentiating concepts, developing more pragmatic conceptions. What had begun as a revolutionary program with quasi-mathematical rigor issued into nuanced analyses in the philosophy of science.
The Lasting Achievements
Despite the failure of the original program, central achievements of the Vienna Circle remained influential:
1. Conceptual clarity as an ideal: the demand to define philosophical concepts precisely and to avoid ambiguous formulations became the standard of analytic philosophy.
2. Logical analysis as method: the use of modern logic to clarify philosophical problems established itself as a legitimate procedure—even though the hope for complete formalization was given up.
3. Orientation toward the empirical sciences: the close connection between philosophy and science (physics, biology, psychology) lastingly shaped the philosophy of science.
4. Anti-metaphysics as a critical principle: skepticism toward unsubstantiated metaphysical claims remained an important corrective—even though the radical elimination of all metaphysics was recognized as impossible.
These achievements constitute a lasting challenge for any form of systematic philosophy—including for contemporary interpretations of Hegel. An adequate reception of Hegel must be able to show that dialectical thinking meets these legitimate demands: conceptual precision (even if not formalization), reference to experience (even if not naive verification), critical reflection (even if not blanket elimination of metaphysics).
The Transition: Wittgenstein’s Radical Turn
The systematic limits of logical empiricism were shown from various sides—but no one carried out a more radical self-critique than Ludwig Wittgenstein, whose Tractatus had inspired the Vienna Circle.
In the late 1920s, after his return to Cambridge, Wittgenstein began to fundamentally criticize his own earlier position. The idea of a logically perfect language that pictures the logical structure of reality now appeared to him a philosophical illusion.
This turn was not gradual, but radical:
- Not one logic of language, but a plurality of “language games”
- Not picturing facts, but use in practices
- Not explanation through theory, but description of ways of using
- Not grounding on ultimate foundations, but clarification of misunderstandings
- Not system, but therapeutic dissolution of philosophical problems
This transformation was not only methodological but existential. Wittgenstein recognized: the search for the ultimate foundations, for the one true logic, for the complete analysis is itself a category mistake—the attempt to reduce the plural practices of language to a uniform scheme.
The Ironic Convergence with Hegel
This turn marked at the same time—without Wittgenstein intending or knowing it—an approach to insights that Hegel had developed in a different way:
- The plurality of forms of reason (various language games / various shapes of spirit)
- The context-dependence of meaning (use in forms of life / mediation through social practice)
- The critique of abstract universality (no pure logic / no abstract categories)
- The priority of concrete practice (language games as forms of life / objective spirit as ethical life)
But Wittgenstein carried out this turn without having read Hegel—and without sharing his systematic aspiration. Where Hegel integrates the plurality of forms in a dialectical development, Wittgenstein leaves them in their diversity. Where Hegel explicates the immanent logic of mediation, Wittgenstein merely describes the factual usages. Where Hegel strives for system, Wittgenstein practices therapy.
The question that arises: is Wittgenstein’s renunciation of system an overcoming of Hegel—or a relapse behind insights that Hegel had already developed? Does the “family resemblance” of language games not have the same structure as Hegel’s “concrete universality”? Is Wittgenstein’s “therapy” not itself a form of philosophy that fails to reflect on its own systematic presuppositions?
These questions lead us to the late Wittgenstein—and to the possibility of a productive confrontation between analytic philosophy of language and dialectical logic.
On the history of the Vienna Circle, see Friedrich Stadler: The Vienna Circle. Studies in the Origins, Development, and Influence of Logical Empiricism, Vienna: Springer, 1997 (2nd ed. 2015). ↩︎
Ludwig Wittgenstein: Tractatus Logico-Philosophicus, London: Routledge, 1921 (German ed. 1963), thesis 7. ↩︎
Moritz Schlick: “Meaning and Verification,” in: The Philosophical Review 45 (1936), pp. 339–369. ↩︎
Rudolf Carnap: “The Elimination of Metaphysics through Logical Analysis of Language,” in: Erkenntnis 2 (1931), pp. 219–241. ↩︎
G.W.F. Hegel: Science of Logic I, in: Works vol. 5, Frankfurt/M.: Suhrkamp, 1969, p. 82. Cited according to Carnap (1931), p. 229. ↩︎
Moritz Schlick: General Theory of Knowledge, Berlin: Springer, 1918 (2nd ed. 1925); idem: “Meaning and Verification” (1936). ↩︎
Carl G. Hempel: “Problems and Changes in the Empiricist Criterion of Meaning,” in: Revue Internationale de Philosophie 11 (1950), pp. 41–63. ↩︎
W.V.O. Quine: “Two Dogmas of Empiricism,” in: The Philosophical Review 60 (1951), pp. 20–43. ↩︎
Hegel’s Science of Logic (in preparation), Ch. 7.6 ↩︎
The murderer, Johann Nelböck, was sentenced to only 10 years’ imprisonment and pardoned after a short time. In the atmosphere of the Austro-fascist corporate state, the act was partly portrayed as a justified reaction against “Jewish Bolshevism”—although Schlick was neither Jewish nor communist. ↩︎
Carl G. Hempel: “Problems and Changes in the Empiricist Criterion of Meaning,” in: Revue Internationale de Philosophie 4 (1950), pp. 41–63. Hempel, himself originally an adherent of verificationism, shows its untenability. ↩︎
Willard Van Orman Quine: “Two Dogmas of Empiricism,” in: Philosophical Review 60 (1951), pp. 20–43. One of the most influential essays of analytic philosophy. ↩︎
Thomas S. Kuhn: The Structure of Scientific Revolutions, Chicago: University of Chicago Press, 1962. Revolutionized the philosophy of science through a historical perspective. ↩︎