Science fiction and socialism have always had a close relationship. Many sf novelists and filmmakers are leftists. Others examine explicit or implicit Marxist concerns. As a genre, sf is ideally suited to critiquing the present through its explorations of the social and political possibilities of the future. This is the first collection to combine analyses of sf literature and films within a broader overview of Marxist theorisations of and critical perspectives on the genre. This is an accessible and lively introduction for anyone studying the politics of sf, covering a rich variety of examples from Weimar cinema to mainstream Hollywood films, and novelists from Jules Verne and H.G. Wells to Kim Stanley Robinson, Ken MacLeod and Charles Stross.