illennials seem doomed to generational warfare: without the organisations and categories that once sought to treat the problem of inequality on its distinct, class-based terms, a fight between generations is now the only plausible option. The irony is that the increasing salience of generational categories provides a sociology for a world that has become less sociological: when all other forms of affiliation and belonging have become weak, generational divides are bound to resurface as a last resort. Together with race, gender, or ethnic background, generational markers imply a crisis of collective life rather than a remedy for it. As Mannheim himself never forgot, the persistence of generational thinking means that humanity hasn’t fully liberated itself from biology: the struggle between generations, in this sense, is just another instance of the struggle of species.