German sociologist Ralf Dahrendorf died today at the age of 80. Jan Feddersen writes: "Dahrendorf was the first intellectual star of the fledging Bundesrepulik to seek and find acknowledgement abroad. He also studied in USA, received his first PhD in 1952 for a dissertation on the concept of justice in the writings of Karl Marx. In 1957 he obtained his 'habilitation' - recognition of the right to lecture in German universities - with the publication of 'Class and Class Conflict in Industrial Society'. Jürgen Habermas, who celebrated his 80th birthday last week, and had been an admirer of Dahrendorf's since that time, as he admitted at Dahrendorf's birthday celebrations a few weeks ago, said: "With his constructive intellect that preferred to create clarity with idealised stylisations than to juggle with hermeneutics, Dahrendorg was remarkable for his powerful eloquence, his natural command of authority and his somewhat angular manner of speech. What singled him out from his peers was his ability to see off received ideas with avant-gardist aplomb."