Otto Weininger's controversial book Sex and Character, first published in Vienna in 1903, is a prime example of the conflicting discourses central to its time: antisemitism, scientific racism and biologism, misogyny, the cult and crisis of masculinity, psychological introspection versus empiricism, German idealism, the women's movement and the idea of human emancipation, the quest for sexual liberation, and the debates about homosexuality. Combining rational reasoning with irrational outbursts,