This chapter looks at the ways sf visions of the future published in the decades following World War II both challenge the dominant ideology of American exceptionalism – the notion that the United States is a single homogenous nation uniquely exempt from history – and the Program Era division between literary and genre fiction. Both Program Era realism and sf develop representations of the present. However, sf’s mirror is a distorting anamorphic one, presenting imaginary futures that help its readers cognize the contradictions, conflicts, and struggles that are always at work in any historical situation, and which naturalizing formulations such as American exceptionalism occlude. The chapter traces shifting practices of representing the future, beginning with 1950s dystopias, postapocalypses, and alternate histories through the radical visions of the New Wave and the new practices of postmodern cyberpunk and critical dystopia up to the recent wave of literary sf and climate change fiction.