Most of the makers of the twentieth-century mind, figures such as Freud, Heisenberg, Picasso, Joyce, and Eliot, have in common an about-face on the subject-object question and the mindmatter question; they all reject the dualism that arbitrarily and irreversibly splits the world into pieces. This rejection of dualism and the corresponding reach for monism are of the essence in understanding the revolutionary nature of twentieth-century science and art.