Jurgen Habermas, one of Germany's most influential modern philosophers, has died at the age of 96.
Habermas died on Saturday in the Bavarian town of Starnberg, his publisher Suhrkamp Verlag said.
Widely regarded as a towering European public intellectual of the 20th century, his major works were developed in Frankfurt, where his career began in the 1950s at the Institute for Social Research under philosopher Theodor W Adorno.
Habermas was born in Dusseldorf on June 18, 1929 and studied philosophy, psychology, German literature and economics in Göttingen, Zurich and Bonn.
His political analysis helped shape Germany's post-war intellectual climate beginning with the publication of The Structural Transformation of the Public Sphere in 1962.
His best-known works included the two-volume Theory of Communicative Action published in 1981, regarded as a seminal work of philosophy.
Habermas' studies frequently examined the concept of the public sphere and explored the forms of discourse best suited to organising democratic societies.
Habermas, who was 15 at the time of Nazi Germany's defeat, later recalled the dawn of a new era in 1945 and his coming to terms with the reality of Nazi crimes as something without which he would not have found his way into philosophy and social theory.
He recalled that "you saw suddenly that it was a politically criminal system in which you had lived".
He had an ambivalent relationship with the left-wing student movement of the late 1960s in Germany and beyond, engaging with it but also warning at the time against the danger of what he called "left-wing fascism" - a reaction to a firebrand speech by a student leader that he later said was "slightly out of place".
He would later recognise the movement as having driven a "fundamental liberalisation" of German society.
In the 1980s, Habermas was a prominent figure in the so-called Historians' Dispute, in which Berlin historian Ernst Nolte and others called for a new perspective on the Third Reich and German identity.
They tended to compare what happened under Adolf Hitler to atrocities carried out by other governments, such as the deaths of millions in the Soviet Union under Joseph Stalin.
Habermas and other opponents contended that the conservative historians were trying to lessen the magnitude of Nazi crimes through such comparisons.
German Chancellor Friedrich Merz said on Saturday that "Germany and Europe have lost one of the most significant thinkers of our time".
Germany's conservative leader said that "his sociological and philosophical work had an impact on generations of researchers and thinkers".
Merz praised "Habermas' intellectual forcefulness and his liberality" and said in a statement that "his voice will be missed".
Habermas was born with a cleft palate that required repeated operations as a child, an experience that helped inform his later thinking about language.
He said he had experienced the importance of spoken language as "a layer of commonality without which we as individuals cannot exist" and recalled struggling to make himself understood.
He also spoke of the "superiority of the written word" and said that "the written form conceals the flaws of the oral".
with AP