One major school of criticism is Marxist criticism. Please summarize what you know about it.
Marxist literary criticism applies the social, political, and economic theories of Karl Marx to literary texts. Some other schools of literary criticism, such as cultural studies and new historicism have been strongly influenced by Marxist ideas as well, and thus can be seen as types of Marxist criticism.
All Marxist criticism investigate the way economics, and especially class conflicts, affect literary texts. One Marxist approach looks for evidence of class struggles or economic issues within texts. Another Marxist approach is to look at how ideology and class affect authors, and thus influence how they write.
A major and growing Marxist approach to literary studies looks at the economics of authorship and book production, and how economic and class factors affect what is published, the material nature of texts, and how texts are received.
According to Marxism, the consciousness of a given class at a given historical moment derives from modes of material production. The set of beliefs, values, attitudes, and ideas that constitutes the consciousness of this class forms an ideological superstructure, and this ideological superstructure is shaped and determined by the material infrastructure or economic base. Hence the term "historical materialism." Marxism assumes the ontological priority of matter over mind and sees mind as the product of historical forces. There is thus a dialectical relationship between the literary work and its sociohistorical background.