This document provides an overview of postmodernism and its relationship to modernism. It discusses key characteristics of postmodernism such as a rejection of grand narratives, irony, self-reflexivity, and mixing of styles. The Beat movement is presented as a precursor to postmodernism through its dissent from conformity and privileging of diversity. Elements of postmodern literature are defined, including pastiche, metafiction, and intertextuality. Potential problems with postmodernism are noted around a lack of new ideas and focus on dystopia without solutions. The document traces literary periods and concludes by discussing the current post-postmodern or metamodern era.