There is a new sensibility to the concept of the future in recent writings in the human and social sciences. The modern idea of the future is undergoing a tremendous rupture today such that older or taken-for-granted assumptions about it can no longer be left unscrutinized. While much of the new interest in the future is about events yet to come – and the spectre of catastrophe looms large in such thinking – the challenge for social theory is to understand how the future should be conceptualized today and how it relates to other concepts, such as space, hope, possibility and utopia. Some of the major controverses about how the future should be conceptualized can be summed up around the following debates, which are explored in this introductory article: the question of the temporality of the future, the extent to which the future is open, whether utopia has been superseded by dystopia and the implications of posthumanism especially in the context of the emergence of new technologies that have far-reaching implications for the human condition.