Lebenswelt (German for lifeworld) — a central concept of Edmund Husserl’s (1859–1938) late phenomenology, introduced systematically in The Crisis of European Sciences and Transcendental Phenomenology (written 1935–37, published posthumously in 1954). The Lebenswelt designates the pre-theoretical, pre-scientific world of everyday experience: the horizon of familiarity and immediate self-evidence within which all human activity — including scientific activity — already always takes place, prior to any theorising. It is a world that is pre-predicative (prior to logical judgement), intersubjective (always already shared with others), historical, and eminently practical, one in which the subject moves as an embodied agent dealing with things rather than as a spectator observing them from a distance. The “crisis” Husserl diagnoses is the forgetting of this originary soil: by mathematising and idealising nature (Galileo is the symbol of this turn), modern science erects a world of abstractions that claims to replace lived experience but in fact presupposes it at every step. A clear example is geometry, whose ideal figures derive, through idealisation, from the rough shapes we measure and handle in practical life. Heidegger explored an analogous structure with his notion of being-in-the-world (In-der-Welt-Sein), the pre-reflective practical engagement with one’s environment. Alfred Schutz (1899–1959) transposed the notion into phenomenological sociology, and Jürgen Habermas, in The Theory of Communicative Action (1981), opposed the Lebenswelt — the background of communicative action — to the system (market and bureaucracy), diagnosing the “colonisation of the lifeworld” as a pathology of modernity. Related concepts include phenomenological epoché and intersubjectivity.

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