1984 by George Orwell

"Nineteen Eighty-Four, often published as 1984, is a dystopian novel by English author George Orwell published in 1949.[1][2] The novel is set in Airstrip One (formerly known as Great Britain), a province of the superstate Oceania in a world of perpetual war, omnipresent government surveillance and public manipulation, dictated by a political system euphemistically named English Socialism (or Ingsoc in the government's invented language, Newspeak) under the control of a privileged Inner Party elite, that persecutes individualism and independent thinking as "thoughtcrime""

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