The document outlines the major art movements of the early 20th century avant-garde including Primitivism, Fauvism, Cubism, Italian Futurism, Simultaneism, and German Expressionism. It provides examples of seminal artworks created during these periods by artists such as Henri Rousseau, Henri Matisse, Pablo Picasso, Umberto Boccioni, Sonia Delaunay, and Franz Marc that helped define each style through experimentation with forms, subjects, and techniques that broke from conventions of academic art.