Yes, Sigmund Freud was influenced by Friedrich Nietzsche, particularly in regards to certain philosophical ideas that influenced his development of psychoanalytic theory. While Freud didn't directly credit Nietzsche as a primary influence, scholars have noted several connections between their ideas.
The Unconscious: Nietzsche's concept of the unconscious mind, though not developed in the same depth as Freud's, hinted at the idea of hidden drives and motivations influencing human behavior. Freud's elaboration on the unconscious was central to his psychoanalytic theory.
Repression and Sublimation: Both Freud and Nietzsche discussed the concept of repression, albeit from different perspectives. Freud emphasized the role of unconscious repression in the development of neuroses, while Nietzsche explored the idea of the sublimation of instincts and desires into socially acceptable forms.
Sexuality and Civilization: Nietzsche's thoughts on the tension between human instincts and the demands of civilization resonate with Freud's theories, particularly his ideas about the role of sexuality in shaping individual psychology and society.
Will to Power: Nietzsche's concept of the "will to power" has parallels with Freud's theories about the driving forces behind human behavior, particularly in his emphasis on unconscious desires and motives.
Critique of Religion and Morality: Both Freud and Nietzsche were critical of traditional religious and moral beliefs, seeing them as sources of repression and psychological conflict.
While Freud didn't explicitly acknowledge Nietzsche as an influence, the similarities in their ideas suggest that Nietzsche's philosophy may have played a role in shaping Freud's thinking, especially in terms of his understanding of human psychology and behavior.