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Thinkers

Jurgen Habermas

Critical Theory · Europe · 1929 to 2026

German thinker who argued that rules for living together are justified through open, fair discussion among everyone affected.

What it is

Jürgen Habermas (1929 to 2026) was a German philosopher and social theorist, one of the leading thinkers of Europe after the Second World War, and a prominent public intellectual. He belongs to the second generation of the Frankfurt School of critical theory, and he is known for his ideas about the public sphere, communicative action, and a theory of ethics, law and democracy built on reasoned discussion.

He was born in Germany in 1929 and trained in philosophy. He worked for three years as an assistant to Theodor Adorno at the Institute for Social Research in Frankfurt, and he wrote his habilitation, The Structural Transformation of the Public Sphere, at the University of Marburg. He later returned to Frankfurt as a professor. His two-volume Theory of Communicative Action appeared in 1981 and began his mature work. He died in 2026.

The main ideas

  • The public sphere. In his early work Habermas studied the public sphere, the space in which citizens discuss matters of common concern and form opinions. The idea has become one of his most influential.
  • Communicative action. His mature work started a 'communicative turn' in critical theory. He argued that language, and the effort to reach understanding through reasons, is the basis of social life. It contrasted with the approach of his mentors, Max Horkheimer and Adorno.
  • Lifeworld and system. In social theory he separated the lifeworld, the stock of shared understandings that structure daily interaction, from the systems of economy and administration. He warned of the colonization of the lifeworld by the systems.
  • Discourse ethics. A norm is valid, he argued, only if everyone affected could accept it in a reasoned discussion. This is his theory of morality.
  • Law and democracy. In Between Facts and Norms he applied the discourse idea to law and democratic government, and tried to explain how citizens' reasoned discussion can give laws their legitimacy.
  • Post-metaphysical thinking. He tried to build a philosophy that is linguistically oriented and that does not rely on the traditional claims of metaphysics.
  • The Enlightenment. He defended what he called its unfinished emancipatory project, against critics who saw reason as bound up with domination.

What it looks like in practice

Picture a town meeting about whether to close a library. A Habermasian question is not just who wins the vote, but whether the people affected could all accept the decision after hearing the reasons. Were all the relevant voices heard? Did anyone give reasons that others could weigh, or was the outcome decided by money, position or pressure? The ideal is a decision that those it affects could agree to in a fair discussion.

Books and moments

  • The Structural Transformation of the Public Sphere was his habilitation, written at Marburg, and it made his name.
  • The Theory of Communicative Action (1981) is his major work of social theory.
  • Between Facts and Norms is his work on law and democracy.

Questions and criticism

  • Is a fair discussion possible? Real discussions are shaped by unequal power and time. It is fair to ask how close any discussion can come to the ideal.
  • Is he really Frankfurt School? He is often labelled a second-generation theorist of the school, but his association with it is only one of several allegiances and the label can mislead.
  • Can philosophy do without metaphysics? His post-metaphysical approach raises the question of what, if anything, grounds a claim that people ought to reason together.

Close neighbours

Habermas worked in the tradition of the Frankfurt School and learned from Adorno and Horkheimer, though he took critical theory in a new direction. He also drew on Kant in his ethics. The page on Kantian deontology describes the ethics of duty that his discourse ethics echoes.

Written by epchē in our own words, and checked against independent sources on 9 October 2026. The sources are listed below.

Who they connect to

Influenced

  • Axel Honneth · He was Habermas' assistant and carried critical theory forward from his work.

Influenced by

  • Charles Sanders Peirce · Habermas and Karl-Otto Apel drew on Peirce's community of inquirers.
  • G. W. F. Hegel · Habermas takes up Hegel's idea of reason developing in social life while dropping his absolute.
  • Immanuel Kant · Habermas' discourse ethics recasts Kant's universal law as a test in open discussion.
  • Karl Marx · Habermas began as a critical theorist reworking Marx's account of society.
  • Theodor Adorno · Habermas was Adorno's assistant and the heir of the Frankfurt School, and later broke with its pessimism.

Reacted against

  • Hans-Georg Gadamer · Habermas argued with him over whether tradition can be questioned from outside.
  • Martin Heidegger · Habermas criticised Heidegger's turn away from reason and his political record.
  • Michel Foucault · The Philosophical Discourse of Modernity criticises Foucault for undermining the grounds of critique.
  • Theodor Adorno · Habermas held that the earlier critical theory had left no room for communicative reason.

Reacted against by

  • Enrique Dussel · Dussel argued in his exchange with Apel that discourse ethics leaves out the excluded and the poor.

Runs parallel to

  • John Rawls · The two held a well-known exchange on the justification of liberal principles.

Other Critical Theory thinkers

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