BERLIN (AP) — Jürgen Habermas, whose work on communication, rationality and sociology made him one of the world’s most influential philosophers and a key intellectual figure in his native Germany, has died. He was 96.

Habermas’ publisher, Suhrkamp, said he died on Saturday in Starnberg, near Munich.

Habermas frequently weighed in on political matters over several decades. His extensive writing crossed the boundaries of academic and philosophical disciplines, providing a vision of modern society and social interaction. His best-known works included the two-volume “Theory of Communicative Action.”

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 wouldn’t 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 recognize the movement as having driven a “fundamental liberalization” 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 Stalin. Habermas and other opponents contended that the conservative historians were trying to lessen the magnitude of Nazi crimes through such comparisons.

Chancellor Friedrich Merz said that “Germany and Europe have lost one of the most significant thinkers of our time.”

Germany’s center-right 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 supported the rise to power of center-left Chancellor Gerhard Schröder in 1998. He was critical of the “technocratic” approach and perceived lack of political vision of Schröder’s conservative successor, Angela Merkel, complaining in 2016 of the paralyzing effects on public opinion of “the foam blanket of Merkel’s policy of sending people to sleep.”

He was particularly critical of the “limited interest” shown by German politicians, business leaders and media in “shaping a politically effective Europe.” In 2017, he praised newly elected French President Emmanuel Macron for laying out of plans for European reform, saying that “the way he speaks about Europe makes a difference.”

Habermas was born on June 18, 1929, in Duesseldorf and grew up in nearby Gummersbach, where his father headed the local chamber of commerce. He became a member of the Deutsches Jungvolk, a section of the Hitler Youth for younger boys, at 10.

He was born with a cleft palate that required repeated operations as a child, an experience that helped inform his later thinking about language.

Habermas 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.”

His wife, Ute Habermas-Wesselhoeft, died last year. The couple had three children: Tilmann; Rebekka, who died in 2023; and Judith.