New Criticism is a Western school of literary theory that focuses on the close reading of texts. It is not a major school of Indian literary theory.

A.K. Ramanujan is considered the father of modern Indian literary theory. He was a poet, translator, and scholar who wrote extensively about Indian literature and culture.

Ranajit Guha coined the term "subaltern studies" in his book "Elementary Aspects of Peasant Insurgency in Colonial India" (1983).

The central concept of postcolonial theory is Orientalism, which refers to the way in which the West has represented and understood the East.

Dipesh Chakrabarty has written extensively about the concept of "the nation" in his book "Provincializing Europe: Postcolonial Thought and Historical Difference" (2000).

Marxist literary theory focuses on the relationship between literature and society, and how literature reflects and shapes social conditions.

G.N. Devy has written about the concept of "vernacular modernism" in his book "After Amnesia: Tradition and Change in Indian Literary Criticism" (2006).

Feminist literary theory focuses on the representation of women in literature, and how literature reflects and shapes gender roles and relationships.

Kancha Ilaiah Shepherd has written about the concept of "Dalit literature" in his book "Why I Am Not a Hindu: A Sudra Critique of Hindutva Philosophy, Culture and Political Economy" (1996).

Queer theory focuses on the representation of LGBTQ+ people in literature, and how literature reflects and shapes LGBTQ+ identities and experiences.

Verrier Elwin has written about the concept of "tribal literature" in his book "The Muria and Their Ghotul" (1947).

Ecocritical theory focuses on the relationship between literature and the environment, and how literature reflects and shapes our understanding of the natural world.

Amitav Ghosh has written about the concept of "diaspora literature" in his book "In an Antique Land" (1992).

Reader-response theory focuses on the role of the reader in creating meaning, and how the reader's experiences and expectations shape their interpretation of a text.

Tejaswini Niranjana has written about the concept of "translation studies" in her book "Siting Translation: History, Post-Structuralism, and the Colonial Context" (1992).