Otto Weininger was born in Vienna and attended the University of Vienna where he studied a broad array of subjects that included biology, physics, mathematics, philosopy and psychology. The day he received his Ph.D.(1902), he converted to Christianity, and changed all his earlier thoughts and views on life. Through his studies he became aquainted with the opinions of Plato, Kant, St. Augustine, Wagner and others, which influenced his way of thinking. His most important work Geschlecht und Charakter (“Sex and Character”) (1903), which included a philosophical justification to his attitude toward male supriority, anti-feminism and anti-Semitism. After the publication of the book, he became very depressed and had problems with following his own philosophy and eventually he killed himself.
Many of his essays and works were published after his death. His first book became well known and had more than 30 editions in German. The theory of Otto Weininger is based on the relationship of sex and character. Every human being is a combination of male and female elements. The male elements are all positive whereas the female elements are all the opposite (negative). The female is interested in sexual pleasure (prostitute) or in procreation (motherhood). Therefore the Woman is depended on Man. The Jew is even worse than the Woman. The Jew as a common characteristic, does not believe in anything. So the Jews are the major participants in extreme movements like: Communism, Anarchism, Materialism, Atheism and others. Zionism, according to Weininger could only be born as a result of rejecting Judaism. Weininger’s views of anti-Semitism and Jewish self hate served as a justification for Nazi-thinkers for their behaviour.