This document discusses the history and genres of documentaries. It identifies six genres: expositional, observational, participatory, reflexive, poetic, and performative. The expositional genre focuses on social propaganda and was pioneered by John Grierson. The observational genre allows actors to be filmed without interaction. The participatory genre involves interaction between filmmakers and subjects. The reflexive genre brings attention to the filmmaking process. The poetic genre lacks narrative and character development. Finally, the performative genre presents personal and emotional experiences. The document also outlines some key developments in documentary history, including the first fictional films by the Lumière brothers and the staged documentary Nanook of the North.