The Theory of Degeneration, a concept rooted in Nineteenth century has its concerns about moral and societal degradation and this paper explores Robert Bloch’s Psycho series through the lens of this theory of degeneration. The novel Psycho revolves around the psychological decline of Norman Bates, that has decent into violence and insanity, turns out to be emblematic of broader anxieties about the vulnerabilities of civilisation. By analysing the psychological and societal dimensions of degeneration in the Psycho series, the present study illuminates the togetherness of Bloch’s themes of mental illness, moral corruption, and cultural collapse. The character of Norman Bates serves as the focal point of this analysis, his fractured psyche, shaped by a toxic maternal relationship and resulting in dissociative identity disorder, reflects key tenets of degeneration theory, which posits a link between hereditary mental illness and moral degradation. Furthermore, the Bates Motel, isolated and decaying symbolizes the breakdown of traditional family structures and the erosion of community, echoing mid Twentieth centuries cultural anxieties in the sequels Psycho II and Psycho House in a deep context. Through close readings of the texts, supported by theoretical frameworks from degeneration theory and psychoanalytic criticism, this study examines how Bloch’s portrayal of degeneration transcends the personal to critique larger societal shifts. Ultimately, this research argues that Bloch’s Psycho series not only dramatizes individual mental collapse but also critiques the instability of modern civilization, positioning it as a cultural artifact that encapsulates enduring fears of moral and societal decline.