My major preoccupation is the question, ‘What is reality?’ Many of my stories and novels deal with psychotic states or drug-induced states by which I can present the concept of a multiverse rather than a universe. Music and sociology are themes in my novels, also radical political trends; in particular I’ve written about fascism and my fear of it.
Philip K. Dick, Dictionary of Literary Biography, Volume 8, Part 1 (1981)- Philip K. Dick (Wikipedia)
Philip Kindred Dick (December 16, 1928 – March 2, 1982), often referred to by his initials PKD, was an American science fiction writer. He wrote 44 novels and about 121 short stories, most of which appeared in science fiction magazines during his lifetime. His fiction explored varied philosophical and social questions such as the nature of reality, perception, human nature, and identity, and commonly featured characters struggling against elements such as alternate realities, illusory environments, monopolistic corporations, drug abuse, authoritarian governments, and altered states of consciousness.
The basic tool for the manipulation of reality is the manipulation of words. If you can control the meaning of words, you can control the people who must use the words.
Philip K. Dick, How To Build A Universe That Doesn’t Fall Apart Two Days Later (1978)- Total Recall