Notes on Das Altern der Moderne1124 by Peter Bürger. Peter Bürger, Professor emeritus for literature and aesthtic theory, author of the Theory of the Avant-Garde1123, a seminal text in art theory of the 20th century, in this collection of articles written between 1983 and 2000, re-examines some of the main concepts already at the heart of his earlier work, such as the difference between Modernism and the avant-garde, the historic avant-garde's often repeated ambition of bringing art and life together, and what constitutes the failure as well as the success of those movements. While the hopes of the historic avant-garde of permanent transformations of the social world were not rewarded, avant-garde ideas, slogans, strategies and aesthetic methodologies of the Futurists, dadaists and Surrealists have found a permanent place in the cultural 'history' by having entered the endless recycling relationships of contemporary culture via popular culture. Slightly different the case, then with Modernism, because it never had, or purpoted not to have, such a strong social agenda, yet here the name of the art movement is identical with the name of an age: modernity. In this respect, Bürger asks the fascinating question about the aging of modernity and how we became postmodern (or not).