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Jacques Lacan was a French psychoanalyst who is considered one of the most influential thinkers in the history of psychoanalysis. He was born in Paris in 1901 and died there in 1981. Lacan's work is often seen as a radical departure from the work of Sigmund Freud, the founder of psychoanalysis. Lacan's ideas have been influential in a wide range of fields, including philosophy, literature, and film theory.