Key ideas from Dr Kathryn Paige Harden

• Childhood antisocial behavior with callous-unemotional traits shows 80% heritability, nearly as high as schizophrenia - Harden
• 4 million person study revealed shared genetic architecture across seven risk-taking behaviors from ADHD to substance use
• Norwegian mass shooter Anders Breivik received maximum 21-year sentence, reflecting society's commitment to rehabilitation over pure retribution
• Genetic information makes jurors more punitive, not less, because they view inherited traits as permanent character flaws
• MAOA gene mutation on X chromosome caused extreme violence in one Dutch family's males while females remained unaffected
• Retribution activates reward pathways in the brain - we literally feel pleasure when perceived wrongdoers suffer punishment
• Embryo selection raises concerns about turning chance events into choices, potentially changing societal solidarity for genetic conditions
• Modern schools are 'culturally insane' for expecting pubertal boys to sit still indoors all day with no physical activity - Harden