Unlike Marxism, anarchism does not have an official, orthodox, philosophy. For Marxism, this is “dialectical materialism.” (By now there are so many different interpretations of dialectical materialism--as there are of Marxism--that it may be inappropriate to regard it as one philosophy.) Of course, anarchists, like everyone else, have opinions on the major issues of philosophy: What is reality? What is truth? How do we know anything? What is ethically good?