This document provides an introduction to post-structuralism and deconstruction. It discusses some key concepts from structuralism like signifiers and signified. Post-structuralism rejects the idea that language can convey definite meanings, and that meanings are unstable and open to various interpretations. Derrida's concept of "différance" emphasizes how language lacks a final or central meaning. The document also discusses power theories and how knowledge is used to marginalize subgroups. It defines the subaltern as suppressed classes and argues their histories have been told from the dominant perspective.