The ability to recognize genres has been central to modern critical study of the Pentateuch since the work of Hermann Gunkel at the turn of the twentieth century. This essay surveys the legal, administrative, and literary genres used in the Pentateuch, offering a sense of its generic complexity. Genres are defined not as the fixed and stable forms used to classify texts, as understood by classic form-critical method, but as idealized cognitive models employed as tools for writing and interpreting texts, an understanding drawn from modern genre theory. Because genres are situated in social contexts, Gunkel saw genre as central to writing a history of Israel’s literature. This essay surveys the limitations of Gunkel’s vision yet identifies a way to reconnect with it and write a more organic literary history, one that may intersect with but also at times challenge the results of source- and redaction-critical methods.