This document summarizes several genre theorists and their theories. It identifies Chandler as saying all things have a genre as a way to study texts and audience response. Tudor's theory is that genres need recognizable elements before they can be identified. Altman's theories are that genre has become too focused on semantics over context, and that genres offer audiences pleasures. The document also notes theories by Stam, Grant, Feurer, McQuail, Mittel, Metz, Buckingham, and Neale about genre classification, subgenres, abstractness, uses and gratifications, industry uses, cycles of change, cultural negotiation, and systemization over time.