associate of the Blue Rose symbolist group of Moscow), until he settled in the small Bavarian town of Murnau. In 1908 he bought a copy of Thought-Forms by Annie Besant and Charles Webster Leadbeater. In 1909 he joined the Theosophical Society. The Blue Mountain (1908–1909) was painted at this time, demonstrating his trend toward abstraction. A mountain of blue is flanked by two broad trees, one yellow and one red. A procession, with three riders and several others, crosses at the bottom. The faces, clothing, and saddles of the riders are each a single color, and neither they nor the walking figures display any real detail. The flat planes and the contours also are indicative of Fauvist influence. The broad use of color in The Blue Mountain illustrates Kandinsky's inclination toward an art in which colour is presented independently of form, and in which each color is given equal attention. The composition is more planar; the painting is divided into four sections: the sky, the red tree, the yellow tree, and the blue mountain with the three riders. Blue Rider Period (1911–1914) Kandinsky's paintings from this period are large, expressive coloured masses evaluated independently from forms and lines; these serve no longer to delimit them, but overlap freely to form paintings of extraordinary force. Music was important to the birth of abstract art, since music is abstract by nature—it does not try to represent the exterior world, but expresses in an immediate way the inner feelings of the soul. Kandinsky sometimes used musical terms to identify his works; he called his most spontaneous paintings "improvisations" and described more elaborate works as "compositions." In addition to painting, Kandinsky was an art theorist; his influence on the history of Western art stems perhaps more from his theoretical works than from his paintings. He helped found the Neue Künstlervereinigung München (Munich New Artists' Association), becoming its president in 1909. However, the group could not integrate the radical approach of Kandinsky (and others) with conventional artistic concepts and the group dissolved in late 1911. Kandinsky then formed a new group, the Blue Rider (Der Blaue Reiter) with like-minded artists such as August Macke, Franz Marc, Albert Bloch, and Gabriele Münter. The group released an almanac (The Blue Rider Almanac) and held two exhibits. More of each were planned, but the outbreak of World War I in 1914 ended these plans and sent Kandinsky back