Science fiction produced in the 1970s has long been undervalued, dismissed by Bruce Sterling as "confused, self-involved, and stale". The New Wave was all but over and Cyberpunk had yet to arrive. The decade polarised sf - on the one hand it aspired to be a serious form, addressing issues such as race, Vietnam, feminism, ecology and sexuality, on the other hand it broke box office records with Star Wars, Close Encounters of the Third Kind, Alien and...