Owen Hatherley, author of Militant Modernism and, forthcoming with Verso this Autumn, The New Ruins of Great Britain (watch this space for details), discusses the Situationists, psychogeography and Manchester in the new issue of Loops.
See our new collection of key Situationist texts, The Situationists and the City,
edited by Tom McDonough.
Also, Mark Fisher asks ‘Why Don’t Groups Split Up Any More?’ and discusses
Timothy Brennan’s Secular Devotion: Afro-Latin Music and Imperial Jazz and an avant garde (such as the Fall and Sonic Youth) that just keeps chugging on (except with little of the ‘avant’).
See also great pieces by Simon Reynolds on science fiction and music and Dan Franklin on the extraordinary Napalm Death.
To guide yourself round the complexities of avant garde music (including the Fall and Sonic Youth) see The Wire Primers: A Guide to Modern Music. 
, Jameson’s ‘nostalgia mode’ is not to be confused with either the nostalgia felt by an individual for his own past or veneration and longing inspired by a remote-in-time antiquity that seems superior to the present. Rather it’s a symptom of artistic and cultural malaise, an inability to innovate forms of narrative and modes of expression capable of representing the present let alone projecting the future.