Fields
Philosophy organized by subject, not by a flat list.
Each field shelf groups published entries by the problem they help answer. Use this page when you want to compare nearby ideas before opening one concept page.
Subject shelves
25 fields, 278 published entries.
56 published entries
Applied ethics
AI, technology, data, privacy, surveillance, medicine, journalism, law, education, housing, energy, workplace power, consumer responsibility, design, climate, animals, business, and professional responsibility.
Accessibility EthicsAccessibility ethics asks whether access is treated as a late accommodation or as a basic condition of equal participation, dignity, and public design.Advertising EthicsAdvertising ethics asks when persuasion becomes manipulation, when targeting exploits vulnerability, and what truthful communication owes to consumer autonomy.AI EthicsAI ethics asks what humans owe one another when decisions are delegated to artificial intelligence systems: who is accountable, what harms count, which benefits are real, and when a system should not be built or used.Algorithmic BiasAlgorithmic bias asks how automated systems can reproduce or intensify unfairness even when they appear neutral, technical, or statistically impressive.Animal EthicsAnimal ethics asks whether animals matter morally for their own sake, and how sentience, suffering, flourishing, relationships, and ecological context should guide human treatment of them.BioethicsBioethics asks how moral judgment should guide decisions about health, bodies, life, death, research, reproduction, disability, public health, and new biological technologies.Business EthicsBusiness ethics asks what companies and market actors owe to people affected by their decisions, not only what is legal, profitable, or strategically useful.Care EthicsCare ethics asks what people owe one another when lives are interdependent, vulnerable, and sustained by relationships of attention, trust, responsibility, and practical support.
34 published entries
Political philosophy
Justice, liberty, equality, rights, power, ideology, domination, recognition, citizenship, democracy, legitimacy, law, obligation, sovereignty, and public reason.
AlienationAlienation asks why people can live inside institutions they help sustain yet experience those institutions as foreign, hostile, meaningless, or beyond their control.AuthorityAuthority asks when a command is more than force, expertise, habit, or fear, and why anyone should treat an institution's decision as binding.CitizenshipCitizenship asks who belongs to a political community, what members can claim, what they owe, and how membership shapes voice, rights, exclusion, and shared rule.Civil DisobedienceCivil disobedience asks when breaking a law can express deeper fidelity to justice, citizenship, or constitutional principle rather than contempt for law.Common GoodThe common good asks what political life should protect for all, not merely what private individuals happen to want or what aggregate welfare counts.DemocracyDemocracy asks how people can govern together as equals without reducing politics to mob rule, elite management, or periodic voting alone.Distributive JusticeDistributive justice asks what people are owed in the basic distribution of social goods and whether inequality is justified by need, desert, liberty, equality, utility, or fair cooperation.DominationDomination asks whether people live at the mercy of another will, office, employer, majority, state, or social structure that can interfere without accountable justification.
30 published entries
Chinese philosophy
Confucian, Daoist, Mohist, Legalist, and Neo-Confucian concepts in connected form.
DaoDao names the way, course, or generative pattern through which things arise and are guided.DeDe is virtue, potency, or moral power: the cultivated efficacy by which a person, ruler, or way draws others without crude force.Doctrine of the MeanThe Doctrine of the Mean develops equilibrium, harmony, sincerity, and the disciplined fittingness of conduct within Confucian cultivation.Heart-MindHeart-mind translates xin as the seat of thought, feeling, intention, and moral responsiveness, resisting a strict split between reason and emotion.Human Nature in MenciusHuman nature in Mencius is read as incipiently good because ordinary people show sprouts of compassion, shame, respect, and moral discernment.Human Nature in XunziHuman nature in Xunzi is described as needing transformation through ritual, learning, and teachers rather than spontaneous moral goodness.Investigation of ThingsInvestigation of things is a Neo-Confucian practice of studying affairs, texts, and conduct to clarify principle and cultivate judgment.JunziJunzi names the exemplary person in Confucian thought, someone whose character, speech, ritual conduct, and judgment make ethical order visible.
27 published entries
Islamic philosophy
Tawhid, kalam, intellect, soul, existence, essence, causation, revelation, and philosophical theology.
Active IntellectActive intellect asks how human thinking moves from potential understanding to actual knowledge, and how prophecy may be linked to intellect and imagination.AqlAql means intellect or reason, the faculty by which Islamic philosophers and theologians analyze truth, demonstration, revelation, soul, and moral responsibility.AsharismAsharism asks how reason can serve theology while preserving divine omnipotence, revelation, and dependence of created things on God.AverroismAverroism asks how demonstrative philosophy, religious law, and scriptural interpretation can coexist without reducing one to the other.Avicennian MetaphysicsAvicennian metaphysics is the system of being, essence, existence, necessity, contingency, intellect, and emanation associated with Ibn Sina.Createdness of the QuranThe createdness of the Quran debate asks whether divine speech is created or eternal, bringing together revelation, language, power, reason, and political theology.Divine AttributesDivine attributes are names and qualities predicated of God, raising questions about unity, language, revelation, analogy, and theological explanation.Divine SimplicityDivine simplicity asks how divine unity can be preserved when language attributes knowledge, power, will, life, and goodness to God.
24 published entries
Indian philosophy
Self, liberation, knowledge, suffering, metaphysics, reasoning, and paths of practice.
AdvaitaAdvaita asks how liberation comes through realizing the nonduality of Atman and Brahman beneath ignorance and appearance.AhimsaAhimsa is nonviolence or non-harming, a discipline of conduct that links ethics, self-cultivation, compassion, and liberation across Indian traditions.AtmanAtman names the self or innermost reality in many Indian traditions, especially when the question is what persists beneath changing body, thought, and social identity.BrahmanBrahman names ultimate reality in many Vedantic traditions, the ground or fullness through which self, world, knowledge, and liberation are interpreted.DharmaDharma names teaching, law, order, duty, or way of life, depending on the tradition and the problem of right conduct or truth being addressed.DvaitaDvaita asks how devotion, dependence, and liberation make sense if the individual self is not identical with ultimate reality.Inference in NyayaInference in Nyaya asks how reasoning can connect observed signs to unobserved facts without becoming a guess.Jain AnekantavadaJain anekantavada asks how intellectual humility, nonviolence, and plural perspectives can discipline claims about truth.
15 published entries
African and decolonial philosophy
A connected shelf of concepts that becomes clearer when read through examples and comparisons.
African CommunalismAfrican communalism asks how selves, duties, authority, and flourishing are shaped by community without erasing agency or disagreement.Collective MemoryCollective memory asks how societies remember, forget, commemorate, deny, repair, and transmit histories that shape present identity and justice.ColonialityColoniality asks why colonial forms of hierarchy can persist in institutions, categories, and habits long after independence or legal equality.Decolonial ThoughtDecolonial thought asks how philosophy, science, law, culture, and development can carry colonial assumptions even when they present themselves as neutral.Feminist EpistemologyFeminist epistemology asks who is trusted as a knower, which experiences count as evidence, and how power can distort ideals of neutrality.Indigenous KnowledgeIndigenous knowledge asks how land, memory, practice, relation, and sovereignty can challenge narrow accounts of evidence and expertise.IntersectionalityIntersectionality asks why harms can disappear when institutions analyze one axis of identity at a time and miss the people located at their crossing.Liberation PhilosophyLiberation philosophy asks whose suffering, voice, labor, and historical exclusion must become the starting point for philosophical judgment.
11 published entries
Chinese Buddhism
Chan, Pure Land, Tiantai, Huayan, Buddha-nature, emptiness, and cultivation debates.
Buddha-NatureBuddha-nature names the capacity, ground, or condition for awakening, a theme that shaped Chinese debates about whether enlightenment is already present.ChanChan is a Chinese Buddhist tradition that stresses direct awakening, meditation, teacher-student transmission, and seeing one's nature beyond mere words.EmptinessEmptiness means that things lack independent self-existence, a claim Chinese Buddhist traditions use to explain dependence, compassion, and liberation.Gradual CultivationGradual cultivation names the disciplined training, ethical refinement, meditation, and practice that prepare or deepen awakening over time.HuayanHuayan is a Chinese Buddhist tradition that presents reality as mutually interpenetrating, where each phenomenon reflects and depends on all others.No-MindNo-mind names a Chan ideal of responsive awareness free from fixation, where action is clear because grasping thought no longer dominates.Pure LandPure Land Buddhism centers devotional trust, Amitabha, recitation, and rebirth in a supportive field for liberation amid ordinary limits.Skillful MeansSkillful means names adaptive teaching and practice, where methods are judged by their capacity to lead beings toward liberation.
10 published entries
Aesthetics and philosophy of art
A connected shelf of concepts that becomes clearer when read through examples and comparisons.
Aesthetic JudgmentAesthetic judgment asks how a response can be personal yet still make a claim on others' attention and possible agreement.AestheticsAesthetics asks why beauty, art, taste, and form matter, and how aesthetic judgment differs from mere liking or factual description.ArtArt asks what makes something an artwork: form, intention, institution, expression, representation, interpretation, or public practice.BeautyBeauty asks whether aesthetic pleasure reveals something real, expresses judgment, depends on culture, or simply names what we happen to like.ExpressionExpression asks whether art communicates inner life, discovers feeling, organizes form, or creates a public object for shared response.Form and ContentForm and content asks whether meaning can be separated from arrangement, medium, style, rhythm, material, and structure.InterpretationInterpretation asks how meaning is found, made, negotiated, constrained, and revised when works do not speak in only one way.MimesisMimesis asks what art does when it imitates or represents life: copy, reveal, distort, educate, criticize, or transform.
10 published entries
Knowledge
Belief, truth, justification, evidence, skepticism, testimony, expertise, and trust.
BeliefBelief is an attitude of taking something to be the case, whether or not it is true, justified, certain, or consciously chosen.EmpiricismKnowledge is grounded primarily in experience, observation, and sensory contact with the world.EpistemologyEpistemology asks what it means to know something and how belief becomes more than opinion. It studies evidence, truth, doubt, testimony, perception, and intellectual responsibility.ExpertiseExpertise is reliable, cultivated judgment within a domain, but it creates hard questions about trust, disagreement, and public authority.JustificationJustification is what makes a belief rational, warranted, or responsibly held rather than merely guessed, inherited, or lucky.KnowledgeKnowledge is not just a belief that happens to be true; it is a responsible relation to truth, evidence, and the world.RationalismReason has an independent role in securing knowledge that cannot be reduced to sensory experience.SkepticismSkepticism challenges whether our claims to knowledge are secure, forcing philosophy to test evidence, certainty, and standards of inquiry.
10 published entries
Reality and being
Being, substance, causality, identity, universals, particulars, modality, and time.
BeingBeing names the fact or mode of existing, and philosophy uses it to ask what it means for anything at all to be rather than not be.CausalityCausality is the relation by which events, powers, conditions, or agents bring about, explain, or make a difference to other events.IdentityIdentity asks what makes something the same thing across time, change, description, or possible circumstances.MetaphysicsMetaphysics asks what reality is like at the most basic level. It studies not one object in the world, but the categories that make any object, event, or relation intelligible.ModalityModality studies possibility, necessity, contingency, and impossibility: what could be otherwise and what must be so.OntologyOntology asks what exists and what kinds of things reality contains, from ordinary objects to properties, events, numbers, minds, and social facts.ParticularsParticulars are individual things, events, or instances that are not repeatable in the way universals or properties are.SubstanceSubstance is a classic metaphysical idea for what exists in its own right and bears properties, changes, or relations.
9 published entries
Buddhist philosophy
Liberation, no-self, dependent arising, emptiness, compassion, and practice.
AnattaAnatta, or no-self, denies that a permanent independent self can be found in the changing aggregates of experience.BodhisattvaBodhisattva asks how liberation, compassion, wisdom, and vows reshape the aim of spiritual practice.Buddhist EpistemologyBuddhist epistemology asks how knowledge can support liberation while avoiding mistaken assumptions about self, essence, and permanence.Dependent OriginationDependent origination explains phenomena as arising through conditions rather than through independent essence.DukkhaDukkha names suffering, unsatisfactoriness, or instability, the basic diagnosis that makes Buddhist practice and liberation intelligible.MadhyamakaMadhyamaka is the Buddhist middle-way philosophy associated with Nagarjuna, known for using emptiness to dismantle claims of intrinsic nature.NirvanaNirvana is liberation through the extinguishing of craving, ignorance, and bondage, not a simple place, mood, or annihilation.SkandhasSkandhas asks how experience can be understood as a conditioned bundle rather than as evidence for an independent self.
8 published entries
Logic and reasoning
A connected shelf of concepts that becomes clearer when read through examples and comparisons.
A PosterioriA posteriori asks what must be learned from the world rather than settled by reflection alone.A PrioriA priori asks what can be known through reason, concepts, or necessity rather than by checking the world case by case.AbductionAbduction asks how explanation can guide belief when several hypotheses fit the same facts.Analytic-Synthetic DistinctionThe analytic-synthetic distinction asks whether some truths are true by meaning alone and whether that boundary can be defended.DeductionDeduction asks whether an argument preserves truth from premises to conclusion, regardless of how persuasive it sounds.InductionInduction asks how experience can support claims that go beyond what has already been observed.LogicLogic asks what makes reasoning good even before we ask whether the premises are true.ReasonReason asks what makes a belief or action answerable to standards beyond impulse, authority, habit, or private preference.
7 published entries
Philosophy of language
A connected shelf of concepts that becomes clearer when read through examples and comparisons.
Analytic PhilosophyAnalytic philosophy asks how philosophical problems can be clarified through attention to argument, meaning, reference, analysis, and method.Language GamesLanguage games ask readers to see meaning in forms of life, practices, training, response, and use rather than in isolated words.MeaningMeaning asks how marks and sounds come to say something rather than merely occur, and why context can change what is said.Ordinary Language PhilosophyOrdinary language philosophy asks whether some puzzles arise because philosophers pull words away from the practices that give them sense.ReferenceReference asks how language reaches the world, especially when names, descriptions, error, fiction, or context complicate what is picked out.Speech ActsSpeech acts ask how language changes social reality through uptake, authority, convention, intention, and context.Truth ConditionsTruth conditions ask how understanding a statement connects to knowing what the world would have to be like for it to be true.
6 published entries
Philosophy of mind
A connected shelf of concepts that becomes clearer when read through examples and comparisons.
ConsciousnessConsciousness asks how experience can be part of nature while still appearing first-personal, qualitative, unified, and difficult to capture from the outside.DualismDualism asks whether consciousness, thought, and agency require something more than physical structure, function, or behavior.IntentionalityIntentionality asks how thoughts can be directed toward objects, possibilities, absences, meanings, or mistakes.Personal IdentityPersonal identity asks what matters in survival: the same body, the same soul, memory, psychological continuity, narrative, or practical concern.PhysicalismPhysicalism asks how far the physical sciences can explain mind without leaving out experience, meaning, rationality, or agency.QualiaQualia asks whether objective descriptions of brain and behavior can capture what experience is like from the inside.
6 published entries
Philosophy of science
A connected shelf of concepts that becomes clearer when read through examples and comparisons.
ExplanationExplanation asks what makes an answer satisfy the demand for why rather than merely repeat a fact.FalsificationFalsification asks how science can distinguish risky, testable claims from claims protected against every possible result.Paradigm ShiftParadigm shift asks how scientific change can alter not only answers but also the field of acceptable problems, methods, and evidence.ProbabilityProbability asks how evidence should guide belief and action when certainty is unavailable.ReductionismReductionism asks when explaining a thing by its parts clarifies reality and when it loses the structure of the whole.Scientific RealismScientific realism asks whether electrons, genes, fields, and other theoretical entities should be treated as real because they explain scientific success.
4 published entries
Agency and responsibility
Freedom, action, responsibility, blame, and the conditions under which choice matters.
CompatibilismCompatibilism asks whether freedom requires uncaused choice or whether it requires acting from one's reasons, values, and self-control.DeterminismDeterminism asks whether choice and responsibility can survive if every action has a sufficient causal history.Free WillThe free will problem asks whether our choices are genuinely ours if they are shaped by causes such as character, biology, social pressure, or prior events.Moral ResponsibilityMoral responsibility asks what kind of control, knowledge, intention, and social relation make accountability fair.
3 published entries
Ethics
Moral judgment, duties, consequences, character, care, virtues, and ordinary decisions.
DeontologyMoral duties can bind agents regardless of whether violating them would produce better outcomes.UtilitarianismThe right action is often understood as the one that produces the best overall consequences.Virtue EthicsEthics can begin with the formation of good character rather than with rules or consequences alone.
1 published entries
Existence and meaning
Meaning, finitude, absurdity, nihilism, freedom, value, and the shape of a life.
1 published entries
Experience
Consciousness, phenomenology, intentionality, embodiment, perception, and lived structure.
1 published entries
Hellenistic philosophy
Ancient practices of judgment, tranquility, skepticism, virtue, and disciplined attention.
1 published entries
Islamic and early modern philosophy
Reason, certainty, metaphysics, God, mind, causation, and the early modern inheritance.
1 published entries
Kantian philosophy
Conditions of experience, autonomy, moral law, judgment, reason, and transcendental method.
1 published entries
Moral philosophy
Normative theories, virtues, duties, outcomes, care, moral psychology, and disagreement.
1 published entries
Value and meaning
Worth, purpose, meaning, evaluation, nihilism, absurdity, and practical orientation.
Cross-field questions
Some questions need more than one shelf.
What makes a belief count as knowledge?
Begin with knowledge, then test the answer against belief, truth, justification, skepticism, testimony, and expertise.
How should a person act when duties, outcomes, and virtues pull apart?
Read ethics as a set of rival tests: consequences, duties, virtues, care, ritual formation, and moral character.
How should real-world systems be judged when harm, consent, fairness, and accountability collide?
Use applied ethics to move from moral theory into AI, data, privacy, surveillance, medicine, journalism, law, education, housing, energy, workplace power, design, climate, environmental justice, risk, harm, and professional responsibility.
1 published entries
Social and political philosophy
A connected shelf of concepts that becomes clearer when read through examples and comparisons.