Baby-boomers, gen-X, millennials, zoomers: the dividing lines among generations in literary culture have become stark to the point of parody. Granta 166 tests the limits of each generation's given definition in popular culture against the reality of its most sharply observed fiction. Stories by Andrew O'Hagan, Brandon Taylor, Nico Walker and Lillian Fishman fill an issue that captures the change in values, aesthetic emphasis and technological experience among different age cohorts, all the while questioning the legitimacy of the generational conceit. Non-fiction includes meditations on the short history of the idea of 'a generation', as well as on the relative absence of youth revolts in our time, and the shadowy rule of the old - gerontocracy - in societies across the globe.