Expressionism focused on conveying symbolic and emotional meaning through distorted figures, irregular shapes, and bright colors. Key influences included Van Gogh, Munch, and German Romanticism. Major expressionist groups included Die Brücke and Der Blaue Reiter, whose founders like Kirchner, Heckel, Kandinsky, and Marc created emotionally charged works addressing modern life and the human condition. However, expressionism declined after World War I and was condemned by the Nazis, contributing to its demise in Germany in the 1920s-1930s.