Compositions   1867: Symphony No 1 1877: Symphony No 2 1879: String Quartet No 1 1880: On the Steppes of Central Asia 1881: String Quartet No 2 1887: Prince Igor	Philosophy 1859: Mill: On Liberty 1867: Marx: Das Kapital       1883: Nietzche: Thus Spake Zarathustra   1900: Russell: Principia Mathematica