#483 – Julia Shaw: Criminal Psychology of Murder, Serial Killers, Memory & Sex

Episode Summary

Executive Summary: Julia Shaw argues that so-called evil is a spectrum of traits shaped by context, not a fixed identity. The conversation spans dark personality traits, dehumanization, empathy, deception, false memories, sexuality, and environmental crime, emphasizing that human behavior is highly malleable—and that understanding psychology is key to prevention, justice reform, and safer societies.

Main Topics: Evil as a continuum, not a binary (Priority: 5/5): Shaw explains the dark tetrad—psychopathy, sadism, narcissism, and Machiavellianism—as measurable traits that exist on a spectrum in everyone, challenging labels like 'monster' or 'evil person.' Empathy, dehumanization, and evil (Priority: 5/5): She argues that empathy toward people labeled evil is necessary for understanding why harms happen and preventing future harm; dehumanization and de-individuation are central mechanisms in war and violence. False memory, interrogation, and AI (Priority: 5/5): Shaw details how memory is reconstructive, how suggestive questioning can implant false memories, and why AI systems may amplify misinformation and memory distortion. Sexuality, bisexuality, and relationship norms (Priority: 4/5): The discussion covers bisexuality as a valid identity, the Kinsey/Klein frameworks, stigma around non-monogamy, and how social pressure shapes self-understanding and disclosure. Crime psychology and justice reform (Priority: 4/5): Shaw critiques crime narratives that overemphasize serial killers and argues that murder is often impulsive, while higher-recividism harms like fraud and sexual violence deserve stronger prevention focus. Environmental crime ('green crime') (Priority: 5/5): Her new book examines corporate pollution, poaching, illegal mining, and organized environmental harm as a large-scale crime problem driven by conformity, rationalization, and weak enforcement. Memory, healing, and technology (Priority: 4/5): She explores how memory can be intentionally reshaped for resilience, and how tools like Spot and future AI systems might help preserve truthful contemporaneous records instead of distorting them.

Key Arguments: Evil is better understood as a continuum of traits and situational pressures than as a fixed moral essence. Calling people 'evil' can shut down analysis and intensify dehumanization, making future atrocities more likely. Empathy toward perpetrators is not excusing them; it is a practical tool for prevention and safer systems. People are often terrible at lie detection, including police, and overconfidence can contribute to wrongful convictions. False memories are normal features of human cognition and can be shaped quickly by suggestion, authority, and repetition. AI can function like a 'false memory machine' if used carelessly, because it can reinforce and personalize distortions. Sexuality is more fluid and less binary than society assumes; bisexuality and non-monogamy are often stigmatized rather than inherently problematic. Murder is frequently impulsive or situational, while crimes like fraud, elder abuse, and sexual violence may be more predictive of repeated harm. Environmental crime is a major, underappreciated form of organized wrongdoing that requires multilevel investigation and enforcement. People in large harmful systems often conform gradually, rationalize their actions, and only stop when a whistleblower or internal 'hero' intervenes.

Data Points: Dark tetrad traits: 4 traits - Shaw defines the cluster as psychopathy, sadism, narcissism, and Machiavellianism. Black Friday Shopify load: 30 terabytes of data per minute - Mentioned in sponsor read as an example of Shopify’s engineering scale. Black Friday Shopify requests: 32+ million requests per minute - Sponsor read illustrating Shopify infrastructure capacity. MySQL queries at Shopify: 11 million MySQL queries per second - Sponsor read describing Shopify performance under load. False-memory study result: 70% - Shaw’s study found many participants became convinced they had committed a crime that never happened. Murder fantasies among men: about 70% - She cites studies showing most men have fantasized about killing someone. Murder fantasies among women: more than 50% - She says over half of women in two studies reported murder fantasies. Homicide recidivism: 1-3% - Used to argue that murderers are unlikely to kill again compared with other offenders. Climate concern prevalence: 85-90% - Shaw cites a UN climate survey suggesting most people think about the climate crisis regularly. Kinsey scale: 0 to 6 - The classic sexuality continuum from exclusively heterosexual to exclusively homosexual.

Pivotal Quotes: "I don't think people are born evil." — Julia Shaw: On whether Hitler or any person is intrinsically evil from birth. "We have created the ultimate false memory machine." — Julia Shaw: On the risks of generative AI and memory distortion. "Most of the evil in the world is done by people with good intentions." — T. S. Eliot: Closing quote used by the host to summarize the episode’s moral theme.

Implications: The episode urges listeners to replace moral simplifications with psychological literacy: use empathy, better interviewing, and evidence-based systems to reduce harm, improve justice, and guard against memory/AI manipulation.