New World (published in 1932 this warned against the dehumanising aspects of scientific and material 'progress') and the pacifist novel Eyeless in Gaza (1936) were accompanied by a series of wise and brilliant essays, collected in volume form under titles such as Music at Night (1931) and Ends and Means (1937). In 1937, at the height of his fame, Huxley left Europe to live in California, working for a time as a screenwriter in Hollywood. As the West braced itself for war, Huxley came increasingly to believe that the key to solving the world's problems lay in changing the individual through mystical enlightenment. The exploration of the inner life through mysticism and hallucinogenic drugs was to dominate his work for the rest of his life. His beliefs found expression in both fiction (Time Must Have a Stop, 1944, and Island , 1962) and non- fiction (The Perennial Philosophy , 1945; Grey Eminence , 1941; and the account of his first mescalin experience, The Doors of Perception , 1954. Huxley died in California on 22 November 1963.