Arthur Schopenhauer was a German philosopher.His writings were a profound influence on art and aesthetics, music and literature in the 19th century. The Art of Controversy (or The Art of Being Right) is a short treatise written in 1831 in which he presents thirty-eight methods of gaining an unfair advantage in a debate and thereby being right even if you are wrong. Schopenhauer champions the virtue of dialectical argument, in his view wrongly neglected by philosophers in favour of logic, and goes on to discuss the distinction between our conscious intellectual powers and our will. The text is a favourite of debaters including the philosophers Mary Warnock and the Mayor of London Boris Johnson. His work also formed theories of evolution and psychology, largely through his theory of the will to power -- a concept which Nietzsche famously adopted and developed.