Jean-Francois Lyotard (1924 to 1998): The Postmodern Condition: A Report on Knowledge (1979): defines the postmodern as 'incredulity towards metanarratives'; language games (borrowed from Wittgenstein); knowledge legitimated through performativity. The Differend (1983): a differend is a conflict between two parties that cannot be resolved because no rule of judgment is applicable to both; the wrong suffered by the one who has no language to express it (this has been applied in law to the position of victims, minorities and indigenous peoples).
Michel Foucault (1926 to 1984):
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Works: Madness and Civilization (1961), The Birth of the Clinic (1963), The Order of Things (1966), The Archaeology of Knowledge (1969), Discipline and Punish (1975), The History of Sexuality, Vol. I (1976), Society Must Be Defended (lectures 1975 to 1976), and lectures on governmentality.
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Power/knowledge: power and knowledge are inseparable; knowledge produces power and vice versa; power is productive, not merely repressive; and it is dispersed through society (capillary power), not located only in the state or sovereign.
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Sovereign (juridical) power versus disciplinary power: pre-modern power was exercised as sovereign command and spectacle (public execution, as in the opening of Discipline and Punish), while modern power works through discipline, surveillance, examination and normalisation (prisons, schools, hospitals, barracks). Law has increasingly become one of many mechanisms of normalisation, and the legal 'subject' is produced by these practices.
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The Panopticon: Bentham's design for a prison, with a central tower from which inmates may be observed without knowing whether they are being watched; Foucault uses it as the metaphor of modern disciplinary society (self-regulation through the possibility of being watched).
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Biopower and biopolitics: the management of populations (births, health, sexuality) by the state.
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Genealogy: the historical analysis of how present practices and 'truths' emerged from contingent power struggles.
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Foucault urged political theory to 'cut off the king's head', that is, to look at the micro-physics of power rather than only at sovereign commands.
Jacques Derrida (1930 to 2004):
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Deconstruction: the reading of texts to reveal the hidden hierarchies, contradictions and instabilities in their binary oppositions; differance (difference and deferral of meaning); logocentrism (the privilege given to speech and presence); aporia (an impasse); undecidability.
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Works: Of Grammatology (1967), Writing and Difference (1967), Dissemination, 'Force of Law: The Mystical Foundation of Authority' (1990).
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In Force of Law he argues that law is deconstructible (because it is a historical, constructed and changeable system), but justice is not deconstructible (it is an infinite, unconditional demand that law can never fully satisfy). The 'mystical foundation of authority': the founding act of law is itself neither legal nor illegal, a performative act of violence without prior legal justification. Justice is always 'to come' (a venir); a decision is just only when it passes through the ordeal of the undecidable.
Others:
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Jean Baudrillard: Simulacra and Simulation (1981): hyperreality, where signs and simulations replace reality.
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Richard Rorty: Philosophy and the Mirror of Nature (1979), Contingency, Irony and Solidarity (1989): pragmatic anti-foundationalism; liberal ironism.
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Stanley Fish: Is There a Text in This Class? (1980): meaning is produced by interpretive communities; applied to legal interpretation (Doing What Comes Naturally).
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Fredric Jameson: Postmodernism, or the Cultural Logic of Late Capitalism (1991); David Harvey: The Condition of Postmodernity (1989).
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Zygmunt Bauman: Legislators and Interpreters (1987) and Liquid Modernity (2000); Anthony Giddens: The Consequences of Modernity (1990) (late or reflexive modernity); Ulrich Beck: Risk Society (1986).
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Jurgen Habermas: a defender of modernity: 'Modernity: An Unfinished Project' (1980); The Philosophical Discourse of Modernity (1985); Between Facts and Norms (1992): discourse theory of law and democracy, in which law's legitimacy rests on communicative rationality and the idea that norms are valid only if all those affected could agree in rational discourse. He criticised Foucault and Derrida for abandoning reason.
Postmodern legal theorists: Costas Douzinas and Ronnie Warrington (Postmodern Jurisprudence, 1991; Douzinas, The End of Human Rights, 2000); Peter Fitzpatrick (The Mythology of Modern Law, 1992); Drucilla Cornell (The Philosophy of the Limit, 1992); Jack Balkin (deconstruction and law); Boaventura de Sousa Santos (Toward a New Legal Common Sense; the idea of interlegality and the cartographic view of law); Dragan Milovanovic.