Why Did Philosophy Change in the Twentieth Century?

1. The Problem To understand twentieth-century philosophy, a sequence of philosophers’ names and books is not enough. The question is: what changed so profoundly that many philosophical assumptions still current at the end of the nineteenth century became objects of renewed examination in the twentieth? Science became more firmly established as an autonomous institutional discipline; new geometries and problems in set theory arose in mathematics; symbolic logic altered the limits of older logical methods; relativity in physics compelled a reconsideration of ordinary ideas of space, time, and measurement; psychoanalysis questioned the transparency of self-understanding; linguistics opened the way to viewing language not as a list of names but as a system of relations; the world wars struck at modern confidence in progress and reason; colonial rule and resistance created conditions for re-examining the language of universality, civilisation, nation, rights, and history; and the modern state, through administration, census, law, education, archives, police, military, health, and statistics, began to classify human life on an unprecedented scale. These changes did not arise from a single cause, nor did all philosophers give the same response to them. The history of twentieth-century philosophy cannot be compressed into one simple formula. Yet a common situation is visible: philosophy had to clarify anew its own subject matter, method, and justification. As physics, biology, psychology, sociology, and mathematics developed their own specialised methods and institutional domains, the question arose: what is philosophy’s distinctive task? Does philosophy provide a special kind of knowledge beyond experience, analyse the concepts of science, dissolve linguistic confusion, seek the meaning of human existence, criticise power and society, or perform different combinations of all these tasks? The problem of this chapter is not to discover a single causal formula for these changes, but to understand the transformation of the field of problems. A mechanical causalism according to which one historical event ‘produced’ one philosophical theory is unacceptable. It is more accurate to say that science, mathematics, language, psychology, war, colonialism, and new forms of the state placed philosophical questions under new pressures and supplied them with new evidence, new vocabularies, and new crises. From Indian and Mithila perspectives, there is another problem. The history of twentieth-century philosophy has often been written with Europe and America at the centre, while Indian philosophy is placed in a separate box marked ancient or religious tradition. Yet colonial rule, the modern university, print, law, nationalism, linguistic standardisation, and social movements also profoundly affected philosophical questions in India. The question ‘Why did philosophy change in the twentieth century?’ must therefore be answered within a polycentric history of world philosophy. 2. Central Thesis The central thesis of this chapter is that the transformation of twentieth-century philosophy was not merely the convergence of seven or eight separate currents; it was a simultaneous re-examination of the authority of knowledge, the form of reason, the transparency of the self, the role of language, the direction of history, the power of the state, and claims to universality. Older questions did not disappear; their conditions changed. Questions of God, self, truth, causality, freedom, justice, knowledge, language, and society had existed before, but new science, new logic, new institutions, and new political experiences changed the ways in which they were asked in the twentieth century. Science challenged philosophy in two directions. First, by means of its own evidence and methods, science began answering questions that had earlier belonged to natural philosophy. Second, revolutions within science itself challenged philosophical assumptions. Non-Euclidean geometry and the theory of relativity presented pictures of space that differed from ordinary experience and from certain philosophical presuppositions. Consequently, the meanings of terms such as ‘necessary’, ‘a priori’, ‘natural’, and ‘self-evident’ were re-examined. Mathematical logic changed the language of philosophical reasoning. The work of Frege, Russell, Whitehead, and later logicians showed that ordinary grammar and logical structure are not the same thing. Quantification, relation, negation, existence, function, and inference could be expressed in more formal ways. This change produced new ideals of clarity, formality, and analysis in philosophy, although the limits of those ideals were later subjected to severe criticism. गजेन्द्र ठाकु र Psychoanalysis weakened confidence in a completely transparent self. If desire, memory, fear, repression, and unconscious processes operate beyond a person’s own self-description, then the claim ‘I fully know myself’ is not automatically secure. Linguistics likewise challenged a simple naming model of language. Language is not merely an instrument that attaches names to already prepared objects; meaning is formed within systems of difference, structure, rules, and use. The world wars and colonial experience called the moral prestige of modern reason into question. Scientific progress does not by itself guarantee moral progress; highly educated states can develop violence, racism, empire, genocide, prisons, propaganda, and technologies of war. These experiences do not require the rejection of reason; rather, they require the self-critique of reason. The Parallel thesis is therefore this: twentieth-century philosophy is not the story of ‘one new school’, but the story of a multidirectional reorganisation of evidence, reason, language, mind, history, power, and human dignity. 3. Principal Arguments First argument: the autonomy of science put pressure on philosophy to clarify its own task. By the nineteenth and early twentieth centuries, physics, chemistry, biology, psychology, and sociology were progressively becoming specialised disciplines. If science studies empirical facts, what kind of knowledge does philosophy provide? Logical positivists sought an answer in analysing the language, methods, and concepts of science; phenomenology turned towards the structure of experience; existential thought towards the meaning of the human condition; critical theory towards the relations among science, society, and power. The diversity of these answers is itself evidence of the pressure. Second argument: changes in mathematics and physics redefined the limits of ‘self-evident’ knowledge. The development of non-Euclidean geometries showed that Euclidean structure was not the only logical possibility. Einstein’s theory of relativity used mathematical structures to describe physical space-time in ways that differed from traditional intuition. The relation among mathematics, experience, measurement, and reality therefore became central to philosophical debate. This was not a simple ‘refutation’ of Kant’s entire philosophy, but it certainly required a rigorous reconsideration of some assumptions concerning space and geometry. Third argument: modern symbolic logic made a new analysis of the forms of thought possible. Aristotelian term logic was enormously important in the long history of philosophy, but new instruments were required for relations, polyadic predicates, complexities of quantification, and the formality of mathematical proof. Frege’s quantificational logic, Russell’s logical analysis, and projects such as Principia Mathematica created the hope that many confusions could be reduced by clarifying linguistic or logical structure. Later, Gödel’s incompleteness results raised new questions about the limits of formal systems; they did not destroy formalisation, but they checked claims to its omnipotence. Fourth argument: psychoanalysis destabilised a simple model of self-understanding. Freud’s work has remained a subject of clinical, psychological, and cultural controversy, and many of its specific claims have been severely disputed in later science. Yet at the level of philosophical influence a serious question remains: are all the causes of human desires and decisions present in conscious self-description? If not, theories of moral responsibility, freedom, memory, volition, and self-interpretation must become more complex. Fifth argument: linguistics changed the problem of philosophy of language. Saussure directed attention towards language as a system of mutual relations and differences among signs. From this perspective, the meaning of a word is not merely a direct link to an external object; its position within a linguistic system also matters. This point provided a methodological basis for structuralism, and later post-structuralism asked how stable structure itself could be. The philosophical conclusion is not that ‘everything is language’, but that questions of meaning cannot be separated from socially organised systems of signs. Sixth argument: the world wars struck at linear narratives of progress. The First World War displayed modern industrial technology, nationalism, and state organisation together with unprecedented destructive capacity. The Second World War, Nazism, the Holocaust, the atomic bomb, and mass civilian destruction made urgent the question whether science, efficiency, and गजेन्द्र ठाकु रक समानान्तर दर्शन — खण्ड २ administration automatically produce humanity. Questions of civilisation, reason, technology, obedience, responsibility, and evil therefore returned to the philosophical centre with renewed intensity. Seventh argument: colonialism exposed contradictions within European universalism. At the same time that theories of freedom, rights, reason, and self-government were being articulated in Europe, repression, resource control, racial hierarchy, and political subordination continued in many colonies. Concepts such as ‘civilisation’ and ‘backwardness’ could become justifications for rule. Anti-colonial thought brought this contradiction to the foreground: if universal principles are truly universal, why were they not applied to colonised people? And if their language itself was formed through imperial categories, how could it be justly reinterpreted? Eighth argument: the modern state also became a producer of knowledge. Censuses, maps, archives, schools, identity papers, health registers, criminal classifications, land surveys, statistics, and law do not merely collect information; they create administrative categories of citizen, territory, caste, community, disease, crime, qualification, and right. The relation between knowledge and power therefore became a philosophical question. Which classifications describe reality, which are created for administrative convenience, and when does a category itself change social life? These questions became prominent in many currents of twentieth-century thought. Ninth argument: communication, print, mass education, radio, cinema, and later television changed the structure of public truth. Ideas were no longer confined to scholarly books or courtly debate; propaganda, advertising, public opinion, and collective identities were increasingly produced through new media. The relations among language, image, myth, public opinion, ideology, and public reason thereby became independent philosophical questions. Tenth argument: all these transformations were interconnected, but they did not dissolve into one another. Scientific novelty does not prove the truth of psychoanalysis; war did not produce logical analysis; colonialism is not the logical consequence of a linguistic theory. Adequate history is multicausal. Parallel Philosophy accepts this plurality and avoids oversimplifying causation. 4. Pūrvapakṣa A first pūrvapakṣa may say that the statement ‘philosophy changed in the twentieth century’ is itself exaggerated. Philosophy has always changed—from Plato to Aristotle, from Buddhism to Navya-Nyāya, from the medieval world to modernity. To present the twentieth century as a special turning point may therefore be a form of European modernity’s self-glorification. A second pūrvapakṣa holds that drawing philosophical conclusions from changes in science risks scientism. Einstein’s theory is successful physics, but it does not by itself solve questions of ethics, religion, or meaning. Gödel’s theorem is a specific result in formal mathematics; it is improper to turn it into a general slogan such as ‘the human mind is always above the machine’. Freud’s historical influence likewise does not make all his psychological claims true. A third pūrvapakṣa concerns political history. War, colonialism, and crises of state power influence philosophical thought, but if thought is treated as wholly ‘determined’ by social conditions, the independent value of argument may disappear. A philosophy does not become true or false merely because it was written during wartime. A fourth pūrvapakṣa arises from an Indian perspective. If the transformation of twentieth-century philosophy is grounded in science, Frege, Freud, Saussure, the world wars, and European imperialism, Indian traditions may once again become mere reactions to Europe. Their long independent debates on pramāṇa, logic, language, self, emptiness, karma, dharma, society, and liberation could be pushed to the margins of this map. A fifth pūrvapakṣa concerns Mithila. It would be historically unjust to measure a highly developed logical tradition such as Navya-Nyāya solely by the standards of modern symbolic logic. The questions of the Tattvacintāmaṇi and its commentarial tradition differ from those of modern mathematical logic. The conclusion ‘modernity arrived, therefore old philosophy became irrelevant’ is unacceptable. गजेन्द्र ठाकु र 5. Uttarapakṣa The response to the first pūrvapakṣa is that the twentieth century is not being called a ‘unique’ or ‘greatest’ turn, but a period with a distinctive combination of problems. Philosophy had changed in earlier periods too; what is distinctive here is that the institutional autonomy of science, mathematical logic, industrial war, mass states, colonial crisis, mass communication, psychology, and linguistics together generated philosophical pressure within one historical horizon. The response to the second pūrvapakṣa is that Parallel Philosophy rejects scientism. Scientific results possess high evidential value in domains where scientific methods apply; but moral justification, political legitimacy, meaning, dignity, or religious claims require different kinds of reasoning and evidence. Respect for science must include an understanding of science’s limits. Thus both extremes—‘science has proved it, therefore philosophy is over’ and ‘philosophy is independent, therefore science is irrelevant’— are rejected. The response to the third pūrvapakṣa is that historical context does not replace philosophical argument; it clarifies the situation in which questions arise. The experience of war does not prove that ‘reason is bad’; it gives us reason to ask why instrumental efficiency and moral reason are not the same thing. Colonialism does not prove that ‘universality is false’; it shows that universal claims can be selectively applied in practice, and therefore require more rigorous standards. The response to the fourth pūrvapakṣa is that it would be wrong to treat Indian philosophy as a reaction to modern European events. The questions of Indian traditions are historically independent. Yet twentieth-century colonial and postcolonial circumstances altered the study, teaching, translation, classification, and public meaning of those traditions. An independent tradition can enter into dialogue with a modern context; dialogue does not imply derivation. The response to the fifth pūrvapakṣa is that there is no need to prove Mithila’s Navya-Nyāya identical with, or a precursor of, modern logic. The real question is what questions a highly refined tradition of epistemic and logical analysis can raise before modern science, linguistics, formal logic, and university philosophy. Comparison that preserves historical difference makes the limits of both traditions clearer. The general formula of the uttarapakṣa is this: historical change alters the field of questions, not the criterion of truth. Understanding the social causes of a thought’s origin and testing the validity of its argument are two distinct but complementary tasks. 6. Indian Dialogue The philosophical situation of twentieth-century India was deeply connected with colonial rule, modern education, nationalism, social reform, anti-caste movements, religious reinterpretation, industrialisation, and the modern legal state. In this context philosophy was no longer merely an interpretation of ancient texts; questions became acute such as: what does it mean to be ‘modern’? In what form should tradition remain alive? How should the nation relate to individual freedom? Are the institutional forms of caste and religion just? What is the relation between Western science and Indian traditions of knowledge? Gandhi’s Hind Swaraj criticises modern civilisation, machinery, the state, and violence. It is wrong to reduce this critique to a simple anti-science slogan; the deeper questions concern means, forms of life, self-rule, moral self-restraint, and the character of political modernity. Rabindranath Tagore examines the tension between the mechanical collectivism of nationalism and humanistic culture. B. R. Ambedkar brings modern law, equal citizenship, representation, social democracy, and the annihilation of caste into the centre of Indian philosophy. These distinct positions do not agree, but they clearly reveal new questions concerning the modern state, society, and individual. The classical sources of Indian philosophy are not passive before these modern questions. Nyāya provides criteria of evidence and inference; Mīmāṃsā opens the complexities of sentence, duty, and interpretation; Buddhist traditions pose rigorous questions about self, momentariness, causality, and suffering; Jain anekāntavāda disciplines claims by attention to the limits of perspective; Vedānta offers different theses concerning consciousness, self, and world. Yet answers to modern questions cannot be obtained simply by quoting old sūtras; reinterpretation, counterargument, and new evidence are required. गजेन्द्र ठाकु रक समानान्तर दर्शन — खण्ड २ While classifying the field called ‘Indian philosophy’, colonial systems of knowledge themselves employed categories such as philosophy/religion, āstika/nāstika, classical/folk, and Sanskrit/vernacular. Some of these categories are analytically useful; others are excessively simplifying. Parallel Philosophy must neither imprison Indian traditions within colonial lists nor within triumphalist counter-narratives. Texts, arguments, institutions, languages, social contexts, and counterpositions must all be read with evidence. The conclusion of the Indian dialogue is not that twentieth-century philosophy came to India from Europe. A more accurate formulation is that twentieth-century global transformations brought different traditions of knowledge into a field of new shared questions, while each tradition entered that field with its own historical concepts and forms of reasoning. 7. Mithila’s Parallel Perspective From Mithila’s Parallel perspective, an important question at the centre of twentieth-century transformation is this: how should an exceptionally subtle tradition of śāstrārtha enter into dialogue with modern institutions of knowledge? Mithila’s Nyāya– Navya-Nyāya tradition had developed an extraordinarily refined language for analysing pramāṇa, inference, absence, relation, definition, vyāpti, pakṣatā, and logical fallacy. Modern symbolic logic is neither a replacement for this tradition, nor is Navya- Nyāya a precursor of modern logic. Their problem-structures are different. Yet both demand serious discipline concerning clarity, the validity of reasoning, and the limits of claims; here genuine dialogue is possible. The autonomy of science places a question before Mithila’s tradition: how should traditional classifications of pramāṇa engage with the modern laboratory, statistics, instrument-based observation, historical archives, and scientific models? The answer is not that the old list of pramāṇas automatically contains every form of modern knowledge. The Parallel method places the basic philosophical questions of evidence—the sources of knowledge, reliability, error, counterargument, and re-examination—in dialogue with modern methods. Linguistics and modern philosophy of language place another question before Mithila’s multilingual intellectual culture. The technical scholarly language of Sanskrit, the literary and vernacular forms of Maithili, administrative languages, and the languages of modern education are not merely media; they are structures connected with access to knowledge and prestige. Whose language counts as śāstra and whose as folk speech? Whose terminology enters the university, and whose experience changes meaning in translation? Parallel Philosophy treats these as questions of both linguistic dignity and epistemic justice. Care is likewise necessary when reading Mithila’s history in the context of colonialism and the modern state. Administrative archives, censuses, caste classifications, land revenue records, education documents, and linguistic surveys are important sources, but they are not neutral mirrors. At the same time, folk memory, Panji records, manuscripts, literature, oral tradition, and regional claims are not automatically true either. The Parallel view of history reads centre + margin + archive + silence together, while testing the evidence for each claim separately. The distinctive feature of Mithila’s Parallel perspective is that modernity and tradition are not treated as two warring camps. The rigour of evidence in modern science can be accepted without destroying the historical value of classical reasoning; the analytical discipline of Navya-Nyāya can be adopted without declaring it modern symbolic logic; the dignity of Maithili and local sources of knowledge can be affirmed without exempting local claims from criticism. In this method, Mithila is not merely a regional example; it is a testing ground for polycentric philosophical practice. The question is not, ‘What did Mithila discover first?’ The question is, ‘What independent arguments, methods of evidence, and critical disciplines does Mithila’s intellectual tradition bring before the questions of modern world philosophy?’ 8. Contemporary Application The transformations of the twentieth century are directly useful for understanding today’s digital age. The autonomy of science teaches us to acknowledge the domain-specific authority of expertise without granting experts moral or political गजेन्द्र ठाकु र sovereignty. Policy concerning pandemics, climate change, biotechnology, or artificial intelligence cannot be made without scientific evidence; yet ‘What is possible?’ and ‘What is right?’ remain different questions. The legacy of mathematical logic is clear in digital systems and artificial intelligence. Formal rules, algorithms, computation, and models are enormously powerful, but formality does not automatically ensure truth, justice, or fairness. Bad data, biased classifications, incomplete objectives, or unclear social norms can make even a logically consistent system unjust. What is required is logical correctness + quality of evidence + moral accountability. The historical legacy of psychoanalysis remains useful in the broader question whether persons consciously know all their own motivations. Modern psychology does not accept every Freudian theory, but research on unconscious processes, bias, distortions of memory, emotional response, and limits of self-description challenges a simple picture of self-knowledge. Parallel Philosophy therefore demands both scientific evidence and philosophical self-critique in this field. The legacy of linguistics becomes still more important in digital media. The vocabularies of social media, categories used by search engines, automated translation, language models, and content moderation do not merely transmit information; they alter visibility, meaning, prestige, and access. If low-resource languages, local terminology, and regional knowledge are absent from digital structures, epistemic inequality can result. Linguistic plurality is therefore not merely a technical question but a democratic one. Critiques of colonialism now provide tools for examining curricula, museums, archives, maps, ethnic categories, language policy, and global hierarchies of knowledge. But it is equally mistaken to assume that every local claim becomes true simply by being anti-colonial. Even while criticising colonial sources, the disciplines of archaeology, archives, textual study, linguistics, oral history, and comparative evidence remain necessary. The classificatory problem of the modern state takes a new form in digital governance. Biometric identification, data collection, risk assessment, eligibility for social benefits, surveillance, and automated decisions can transform a ‘person’ into a data profile. Administrative efficiency may be necessary, but without dignity, privacy, appeal, transparency, and the right to correction, efficiency is not justice. The Parallel formula for contemporary application is: respect science for the strength of its evidence; logic for clarity; linguistics for understanding the structure of meaning; history for examining memory and power; colonial critique for identifying selective applications of universal claims; and moral philosophy for determining the human limits of all these powers. 9. Chapter Conclusion Philosophy did not change in the twentieth century because one philosopher discovered a new method. The change was profound because the entire environment of knowledge changed. Science became an institutional power distinct from philosophy; revolutions within science challenged older certainties; mathematical logic changed the formal analysis of thought; psychoanalysis questioned the transparency of the self; linguistics viewed meaning within systems of structure and difference; the world wars broke the moral assurance of progress; colonialism exposed selective applications of universality; and the modern state intensified the relation between knowledge and power through classification, archives, and administration. It would be wrong to melt all these into a single theory. Logical positivism, phenomenology, existentialism, structuralism, critical theory, postcolonial thought, and later post-structuralism have different questions, methods, and answers. The philosophical distinctiveness of the twentieth century lies not in agreement but in the expansion of the field of problems. From an Indian perspective, this transformation means neither Western imitation nor a repetition of ancient glory. Nyāya, Mīmāṃsā, grammar, Buddhist, Jain, Vedānta, and other traditions possess independent intellectual histories; modern science, colonialism, the nation, anti-caste movements, modern law, and democracy bring new questions. The real task is to place these independent traditions in an equal dialogue of reasons. गजेन्द्र ठाकु रक समानान्तर दर्शन — खण्ड २ Mithila’s Parallel perspective draws four basic lessons from this chapter. First, when new sources of knowledge arise, methods of evidence must engage in self-critique. Second, the technical discipline of a tradition should not be appropriated simply by giving it a modern name. Third, claims made by modern institutions must be tested by standards of evidence and dignity. Fourth, respect for local knowledge is not a privilege exempt from criticism.