Philosophy

Existentialism: ideas, history, key themes and influence Existentialism Philosophical movement focused on human existence, freedom, responsibility and meaning; developed in 19th–20th century Europe and influential in literature, theology and the arts.

Fallacy: Types, Examples, and How to Recognize Faulty Reasoning Fallacy A fallacy is faulty reasoning that makes an argument invalid or unsound. This article explains formal and informal fallacies, common examples, history, and ways to spot and avoid t…

False analogy (informal logical fallacy) False analogy A false analogy is a misleading comparison that assumes two things are alike in relevant ways when they are not. It is a common informal fallacy in rhetoric, debate, and everyday r…

False dilemma (false dichotomy) False dilemma A false dilemma is an informal logical fallacy that wrongly presents two options as the only possibilities. This article explains its form, examples, history, uses, and how to resp…

Falsifiability Falsifiability is the principle that a claim or theory must allow for potential refutation by observation or experiment; it is central to scientific reasoning and to distinguishing…

Fat feminism: history, principles, and social impact Fat feminism Fat feminism combines feminist critique with fat-positivity, challenging weight-based discrimination, media ideals, and health stigma while promoting bodily autonomy and intersecti…

Fate and Destiny: concepts, cultural history, and artistic influence Fate Overview of fate (destiny): beliefs about preordained outcomes, cultural practices for knowing or resisting fate, philosophical distinctions, and representations in literature, mus…

Femininity: concepts, cultural history, and modern perspectives Femininity An overview of femininity as a cluster of social and biological traits, its cultural variation, historical shifts, contemporary expressions, critiques, and intersections with ident…

Feng shui: Chinese system of spatial harmony and elemental balance Feng shui Feng shui is a traditional Chinese practice of arranging space and orientation to promote balance, auspiciousness and wellbeing through elements, qi, compass directions and form an…

Flower power: 1960s symbol of nonviolence and counterculture Flower power Flower power was a 1960s slogan and cultural symbol advocating passive resistance, peace, and love. It influenced protest tactics, fashion, music, and art and remains associated wi…

Focus: attention, optics, mathematics, and practical uses Focus Focus denotes a center of activity or attention. It refers to mental concentration, optical focal points, mathematical foci, and strategic emphasis in work and design.

Fool: roles, meanings, and cultural forms Fool An overview of the term “fool” across cultures and contexts: entertainers (jesters, clowns), the idea of foolishness, the Tarot’s Fool card, and the French chess term fou (bishop).

Foolishness: meaning, characteristics, history and cultural roles Foolishness Foolishness is acting without sufficient wisdom, sense, or careful reasoning. This article outlines definitions, contrasts with related concepts, historical and literary roles, com…

Forgiveness: concept, history, and effects Forgiveness An overview of forgiveness as an intentional, voluntary response to harm — its features, history, psychological effects, common practices, and distinctions from related ideas.

Francis Hutcheson — Irish philosopher and founder of the Scottish Enlightenment Francis Hutcheson Irish-born philosopher Francis Hutcheson (1694–1746) proposed a moral-sense theory, advanced ideas on beauty and benevolence, and helped shape the Scottish Enlightenment and early…

Franciscan: orders, history and spiritual tradition Franciscan Franciscans are members of religious communities inspired by St. Francis of Assisi. They emphasize poverty, fraternity, care for creation and service to the poor across several Cat…

Fraternity (social concept and civic ideal) Fraternity Fraternity is a moral and social principle of mutual support and solidarity—expressed in politics, philosophy and civil society—and appears in mottos, movements and family traditio…

Free will: concepts, debates, and practical implications Free will Free will refers to the capacity to make choices among alternatives. This article outlines definitions, major philosophical positions, historical development, and why free will mat…

Freedom from Fear: concept, history, and contemporary relevance Freedom from fear Freedom from fear is the principle that people and societies should be protected from avoidable violence, aggression and coercion; it shapes disarmament, human-rights law, social p…

Friedrich Nietzsche (1844–1900) Friedrich Nietzsche German philosopher and classical philologist whose critique of morality, religion, and culture and concepts like the Übermensch and will to power deeply influenced modern thought.

General semantics A 20th-century intellectual movement about how language and mental abstraction shape human reactions and knowledge, founded by Alfred Korzybski with practical techniques for cleare…

Georg Wilhelm Friedrich Hegel: life, system, and influence Georg Wilhelm Friedrich Hegel German philosopher Georg Wilhelm Friedrich Hegel (1770–1831) developed a systematic idealist philosophy addressing history, politics, art, religion and logic; his dialectical metho…

George Berkeley: Irish philosopher and Anglican bishop George Berkeley Irish philosopher and Anglican bishop (1685–1753) known for immaterialism ('esse est percipi'), contributions to British empiricism, major works on perception and theology, and inf…

George Santayana (1863–1952): Philosopher, Poet, and Cultural Critic George Santayana Spanish-born philosopher and man of letters who taught at Harvard; credited for naturalistic philosophy, literary essays, novels and memorable aphorisms such as on history and war.

German idealism Philosophical movement originating in late 18th–early 19th century Germany that emphasized the role of mind or spirit in shaping reality, developing from Kant and leading to Fichte…

German Philosophy: Overview, Development, and Influence German philosophy A concise guide to the German philosophical tradition: its themes, major figures from Leibniz to Wittgenstein, movements such as Idealism and Critical Theory, and its lasting cultu…

Ghost in the Machine A philosophical metaphor for the idea that mind is separate from the body or brain, famously criticized by Gilbert Ryle as a category mistake.

Gilles Deleuze: life, ideas, and influence Gilles Deleuze Overview of the French philosopher Gilles Deleuze (1925–1995), his main works, core concepts such as difference and the rhizome, collaborations, and his influence on art, film, lit…

Giordano Bruno: philosopher, cosmologist and controversial thinker Giordano Bruno Italian Renaissance philosopher Giordano Bruno (1548–1600) proposed an infinite universe, wrote on memory and cosmology, and was executed for doctrines judged heretical by the Roma…

Gluttony Gluttony is excessive consumption or waste of food and resources; a moral and cultural concept with religious, social, psychological, and environmental dimensions.

“God is dead”: Nietzsche’s phrase and its philosophical significance God is dead An encyclopedic overview of Nietzsche’s phrase “God is dead,” its origin, meanings, interpretations, and influence on modern thought including theology, nihilism, and secularizatio…

God paradox (omnipotence paradox) God paradox A philosophical problem about omnipotence: can an all-powerful being perform logically self-contradictory acts (for example, create a weight it cannot lift)? Explores variants, his…

Golden Rule (Ethic of Reciprocity) Golden Rule The Golden Rule, or ethic of reciprocity, advises treating others as you wish to be treated. It appears across religions and philosophies and serves as a practical guide in moral e…

Good and Bad: Concepts of Value and Morality Good and bad An accessible overview of how 'good' and 'bad' function as value judgments and moral terms, surveying definitions, philosophical approaches, cultural variation, and everyday uses.

Gorgias (Plato): Dialogue on Rhetoric, Virtue, and Justice Gorgias (Plato) Plato's Gorgias is a Socratic dialogue that examines rhetoric, moral responsibility, and the nature of justice through debates between Socrates and prominent sophists.

Gradualism: Principles, History, and Applications Gradualism Gradualism is the idea that change unfolds by small, incremental steps. This article outlines its meaning, history, and roles in politics, biology, geology, and practical use.

Grandfather paradox A logical contradiction arising from hypothetical backward time travel: if you prevent your own ancestor's survival, you would negate your own ability to travel back, creating an a…

Guanyin: East Asian Bodhisattva of Compassion and Mercy Guan Yin Guanyin (Guanshiyin) is the East Asian form of Avalokiteśvara, a bodhisattva symbolizing compassion. This article surveys names, iconography, history, devotion, and cultural signif…

Hans‑Georg Gadamer Hans-Georg Gadamer German philosopher Hans‑Georg Gadamer (1900–2002) developed philosophical hermeneutics in Truth and Method, emphasizing history, language, tradition and the 'fusion of horizons' in…

Hatred: nature, causes, social effects, and approaches to reduction Hatred An overview of hatred as an intense emotion: definitions, psychological and social characteristics, historical and legal context, consequences, and strategies to prevent or limit h…

Heaven (religious concept and afterlife realm) Heaven Heaven is a religious idea of a transcendent realm or state associated with reward, peace, or union with the divine after death; descriptions and meanings differ among cultures and…

Hedonism: Philosophical Views on Pleasure, Pain, and the Good Life Hedonism Overview of hedonism: its definitions, historical schools, main variants, criticisms, and relevance to ethics, psychology, and public measures of wellbeing.

Hellenism: Greek culture, the Hellenistic era, and modern meanings Hellenism Hellenism denotes Greek culture, language, and identity across history: classical achievements, the spread of Greek ways in the Hellenistic era, Byzantine continuity, and modern cu…

Heraclitus of Ephesus: Flux, Logos, and the Unity of Opposites Heraclitus Heraclitus (c.535–475 BC), an Ionian pre-Socratic philosopher from Ephesus, best known for teaching that change is fundamental, for his concept of logos, and for an aphoristic styl…

Hermeticism: Origins, Beliefs, Practices, and Influence Hermeticism Hermeticism is a Western esoteric tradition based on writings attributed to Hermes Trismegistus, uniting mystical philosophy, symbolic alchemy, astrology and ritual methods aimed a…

Heuristic: practical rules and methods for problem solving Heuristic A heuristic is a practical, experience-based strategy for finding acceptable solutions quickly. This article explains what heuristics are, how they work, common types, examples, st…

Hindu philosophy: the six classical schools and core ideas Hindu philosophy Overview of the main branches of Hindu philosophy (the ṣaḍdarśana), their distinguishing features, historical context, and contemporary significance.

Holism: principles, history, examples, and relation to reductionism Holism Holism is the view that systems and their properties are best understood as integrated wholes. This article explains its concepts, history, examples, uses, and how it contrasts wit…