This document discusses different theories of genre from several scholars. Steve Neale and John Hartley argue that genres are defined by conventions of content but can change over time and between cultures. David Buckingham asserts that genre is constantly negotiated and changing. John Fiske views genre as structuring media texts for producers and audiences. The document raises questions about how genres may be defined through structure versus content, whether they are culturally fluid, and how audience and economics impact genres.