Lex Fridman Podcast

Podbit · Lex Fridman Podcast

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

Explore episode Oct 14, 2025

Where this was said

Dark Tetrad – Psychopathy, Narcissism, Machiavellianism, Sadism

At 13:30 · chapter starts 8:16

Shaw opens by defining the dark tetrad: psychopathy (low empathy, parasitic lifestyle, deceptiveness), sadism (pleasure in hurting others), narcissism (inflated self-view), and Machiavellianism (doing whatever it takes to get ahead). Crucially, every person scores somewhere on each trait — the goal is to understand where people fall on these continuums rather than sorting the world into monsters and non-monsters. The 'baby Hitler' question becomes a vehicle to argue that nobody is born evil and that the environment is the primary shaper of dark behavior. Shaw is emphatic that the word 'evil' is dangerous — it ends conversations rather than starting them, and enables dehumanization that has historically made mass atrocities possible. Lex and Shaw discuss dehumanization and deindividuation as the twin engines of war violence, and Shaw makes her case for 'evil empathy': understanding perpetrators not to excuse them but to prevent future harm. She addresses the Nietzsche concern (does gazing into the abyss corrupt you?) and describes how she maintains clinical detachment by treating each case as a puzzle. The chapter ends on the question of whether studying dark figures risks platforming them, and Shaw's nuanced take on how coverage of notorious criminals should be handled.

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