This document provides an overview of modern theater, including its origins in the late 1800s parallel to industrialization and intellectual movements. It describes several movements in modern theater such as realism, naturalism, and antirealism (symbolism, expressionism, futurism, dadaism, surrealism). Pioneers of these movements like Ibsen, Chekhov, and Artaud are mentioned. The document also briefly outlines personnel involved in modern productions and common theater configurations.