Arthur Schopenhauer finished *Die Welt als Wille und Vorstellung* (The World as Will and Representation) in Dresden in 1818 and published it in early 1819. He was thirty years old; the book hardly sold for its first decade — Schopenhauer lived on a family inheritance. Recognition came in the 1850s, by which time a third edition had appeared with expanded supplements.

The philosophical architecture accepts Kant's distinction between phenomena and noumena: the world we can know is 'representation' (Vorstellung) — phenomena ordered by our minds in space, time, and causality. But Kant had left the 'noumenon' (the thing-in-itself) unknowable. Schopenhauer proposes this: when we know our body, we know it both from outside (as an object in space) and from inside (as will). What is known from inside — wanting, willing, striving — is the noumenon itself. The whole world, known directly from inside and indirectly from outside, is the same thing: blind, ceaseless, unsatisfiable will.

The ethics that follow from this metaphysics are pessimistic. When a desire is satisfied, boredom takes its place; when it is not, suffering. Life swings between pain and boredom like a pendulum. For Schopenhauer there are three modes of escape: aesthetic contemplation (seeing Plato's Forms, being lost in Wagner's music), moral solidarity (feeling another being's suffering as one's own), and finally the extinction of will in oneself — a kind of 'will-lessness' influenced by Buddhist ascetic traditions.

The book is one of the first serious crossings of Eastern philosophy into the West: Schopenhauer read the Upanishads directly. Nietzsche, Tolstoy, Mahler, Borges, and Freud all walked in the conceptual passage he opened. Modern psychology owes the centrality of 'unconscious desire' largely to him.