Otto Weininger was an Austrian philosopher who in 1903 published the book Geschlecht und Charakter, which gained popularity after his suicide at the age of 23. Weininger had a strong influence on Ludwig Wittgenstein, August Strindberg, and, via his lesser-known work Über die letzten Dinge, on James Joyce. April 3, 1880 – October 4, 1903; died at 23. Alive at the same time as Adolf Hitler, Albert Einstein, Leo Tolstoy, Vincent van Gogh, and Joseph Stalin. Wiki link