This document provides an overview of several critical literary theories that analyze works from both internal and external perspectives. It discusses theories that examine outside influences on a work, such as Marxist, feminist, historical/biographical, and psychological criticism. It also covers reader response theory, which focuses on how readers interact with and construct meaning from a text. Finally, it outlines theories that insist on only examining the work itself, including formalism, New Criticism, and deconstructionism. Formalism analyzes elements like language, structure, and tone. New Criticism emphasizes close reading and textual analysis. Deconstructionism questions assumptions about language and meaning through techniques like identifying dichotomies and irony.