Influential twentieth century Russian scholar and theorist of communication, Mikhail Bakhtin, explores the nature of genre, or social different social practices producing different kinds of text or utterance.

Influential twentieth century Russian scholar and theorist of communication, Mikhail Bakhtin, explores the nature of genre, or social different social practices producing different kinds of text or utterance.
The wealth and diversity of speech genres are boundless because the various possibilities of human activity are inexhaustible, and because each sphere of activity contains an entire repertoire of speech genres that differentiate and grow as the particular sphere develops and becomes more complex. Special emphasis should be placed on the extreme heterogeneity of speech genres (oral and written). In fact, the category of speech genres should include short rejoinders of daily dialogue (and these are extremely varied depending on the subject matter, situation, and participants), everyday narration, writing (in all its various forms), the brief standard military command, the elaborate and detailed order, the fairly variegated repertoire of business documents (for the most part standard), and the diverse world of commentary (in the broad sense of the word: social, political).
And we must also include here the diverse forms of scientific statements and all literary genres (from the proverb to the multivolume novel). It might seem that speech genres are so heterogeneous that they do not have and cannot have a single common level at which they can be studied. For here, on one level of inquiry, appear such heterogeneous phenomena as the single-word everyday rejoinder and the multivolume novel, the military command that is standardized even in its intonation and the profoundly individual lyrical work, and so on. One might think that such functional heterogeneity makes the common features of speech genres excessively abstract and empty. This probably explains why the general problem of speech genres has never really been raised. Literary genres have been studied more than anything else. But from antiquity to the present, they have been studied in terms of their specific literary and artistic features … and not as specific types of utterances distinct from other types … . Rhetorical genres have been studied since antiquity (and not much has been added in subsequent epochs to classical theory). But here, too, the specific features of rhetorical genres (judicial, political) still overshadowed their general linguistic nature. Finally, everyday speech genres have been studied (mainly rejoinders in everyday dialogue), and from a general linguistic standpoint….
The extreme heterogeneity of speech genres and the attendant difficulty of determining the general nature of the utterance should in no way be underestimated. It is especially important here to draw attention to the very significant difference between primary (simple) and secondary (complex) speech genres (understood not as a functional difference). Secondary (complex) speech genres—novels, dramas, all kinds of scientific research, major genres of commentary, and so forth-arise in more complex and comparatively highly developed and organized cultural communication (primarily written) that is artistic, scientific, sociopolitical, and so on. During the process of their formation, they absorb and digest various primary (simple) genres that have taken form in unmediated speech communion. These primary genres are altered and assume a special character when they enter into complex ones. They lose their immediate relation to actual reality and to the real utterances of others. For example, rejoinders of everyday dialogue or letters found in a novel retain their form and their everyday significance only on the plane of the novel’s content. They enter into actual reality only via the novel as a whole, that is, as a literary-artistic event and not as everyday life. The novel as a whole is an utterance just as rejoinders in everyday dialogue or private letters are (they do have a common nature), but unlike these, the novel is a secondary (complex) utterance.
The difference between primary and secondary (ideological) genres is very great and fundamental, but this is precisely why the nature of the utterance should be revealed and defined through analysis of both types. The very interrelations between primary and secondary genres and the process of the historical formation of the latter shed light on the nature of the utterance (and above all on the complex problem of the interrelations among language, ideology, and world view).
A study of the nature of the utterance and of the diversity of generic forms of utterances in various spheres of human activity is immensely important to almost all areas of linguistics and philology. A clear idea of the nature of the utterance in general and of the peculiarities of the various types of utterances (primary and secondary), that is, of various speech genres, is necessary, we think, for research in any special area. To ignore the nature of the utterance or to fail to consider the peculiarities of generic subcategories of speech in any area of linguistic study leads to perfunctoriness and excessive abstractness, distorts the historicity of the research, and weakens the link between language and life. After all, language enters life through concrete utterances (which manifest language) and life enters language through concrete utterances as well. The utterance is an exceptionally important node of problems.
Bakhtin, M. Speech Genres & Other Late Essays, (trans. by Vern W. McGee). Austin, TX: University of Texas Press, 1986, pp. 60-63. || Amazon || WorldCat