Literary theory attempts to establish principles for interpreting and evaluating literary texts. Key issues include: authoral intention, interpretive objectivity, as well as structure, and historical, social, religious, political, and philosophic issues. These issues have given rise to a variety of sub-theories, "schools", or approaches. Critics have used one or more of these different approaches to write about works of literature. Here are found sites about theorists and their works,including texts, as well as discussion of approaches they are/were associated with.