Compositions   1910: String Quartet 1913: Three Orchestral Pieces 1921: Wozzeck 1926: Lyric Suite 1929: Der Wein 1934: Lulu 1935: Violin Concerto	Philosophy 1900: Russell: Principia Mathematica         1929: Heidegger: What is Philosophy?     1943: Sartre: Being and Nothingness