Question: Who wrote the theory and practice of oligarchical collectivism?

context: The Theory and Practice of Oligarchical Collectivism is a fictional book in George Orwell's dystopian novel "Nineteen Eighty-Four" (1949). The book was supposedly written by Emmanuel Goldstein, the principal enemy of the state of Oceania's ruling party. The Party portrays Goldstein as a member of the Inner Party who continually conspired to depose Big Brother and overthrow the government. In the novel, the book is read by the protagonist, Winston Smith who recalls that "There were ... whispered stories of a terrible book, a compendium of all the heresies, of which Goldstein was the author, and which circulated clandestinely here and there. It was a book without a title. People referred to it, if at all, simply as The Book."
question: Who wrote the theory and practice of oligarchical collectivism according to Winston Smith?
short_answers: Emmanuel Goldstein
context: O'Brien rejects as nonsense Winston Smith's perspective that Big Brother and the Party can be overthrown, because he is a member of the Inner Party, and not a revolutionary of the Brotherhood. At the Miniluv, O'Brien tortures Winston to cure him of his political insanity: The belief that there exists an objective reality that is external to the reality of the Party. In their torture chamber conversations, he tells Winston that The Book was written by a committee that included himself. When Winston asks O'Brien if The Book is true, he replies: "As description, yes. The program it sets forth is nonsense."
question: Who wrote the theory and practice of oligarchical collectivism according to O'Brien?
short_answers: a committee that included himself
a committee

Answer: The Theory and Practice of Oligarchical Collectivism is a fictional book in George Orwell's dystopian novel "Nineteen Eighty-Four" (1949). The book is read by the protagonist, Winston Smith, and was supposedly written by Emmanuel Goldstein, the principal enemy of the state of Oceania's ruling party. According to O'Brien, he tells Winston that The Book was written by a committee that included himself.