Big Think The neuroscience of extremes: Ruthless psychopathy to extraordinary generosity | Abigail Marsh
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Sep 26, 2025 
In this engaging discussion, Abigail Marsh, a Georgetown University neuroscientist, explores the complexity of human nature, challenging the idea that we are inherently selfish. She introduces the concept of a 'caring continuum,' linking extreme altruists to psychopathic traits. Marsh explains misconceptions about psychopathy, its genetic roots, and potential treatments. She highlights the fascinating relationship between kindness and cruelty, along with the psychological profiles of individuals at both ends of the spectrum.
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Human Nature Includes Genuine Caring
- Psychopathy's existence proves humans are not universally selfish because psychopaths show extreme selfishness while most people care.
- Neuroscience and behavior studies identify brain systems that specifically value others' welfare.
Psychopathy Is A Spectrum
- Psychopathy is a continuous personality dimension combining callousness, social boldness, and disinhibition.
- Most people lie in the middle, with some individuals at extreme uncaring or extra-caring ends.
Parent Training Works Best Early
- Use parent-management training and PCIT to reduce disruptive behavior in children at risk for psychopathy.
- Train parents to provide affection plus consistent, fast, non-harsh consequences.
