No, the concept of the "death instinct" was proposed by Sigmund Freud, one of the founding fathers of psychoanalysis. In his 1920 book "Beyond the Pleasure Principle," Freud proposed the idea of a death drive, also called Thanatos, which he believed was a fundamental instinct that operates alongside the life drive, or Eros. According to Freud, the death drive represents an innate desire for destruction, aggression, and a return to an inorganic state.
Sabina Spielrein was a psychoanalyst and colleague of Freud's, and she did contribute important ideas to the development of psychoanalysis. In particular, she is known for her work on the concept of the "hysterical disposition" and her early contributions to the development of the idea of the Oedipus complex. Spielrein also had a close personal relationship with Carl Jung, another important figure in the early development of psychoanalysis.
Now, ChatGPT is wrong here.
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She was the first person to introduce the idea of the death instincts, a concept that Freud would later adopt as part of his own theory. In addition to introducing psychoanalysis to Russia, Spielrein also influenced other thinkers of the time including Jean Piaget and Melanie Klein.
https://www.verywellmind.com/sabina-spielrein-1895-1942-2795521