Ideas What makes left-handers special?
Jan 19, 2026
Join Thomas Richardson, a PhD student studying human behavior, as he unveils the evolutionary puzzles surrounding left-handedness and the surprising advantages it offers in combat. Howard Kushner, a retired public health professor, shares stories of historical stigma and the psychological impacts of forced handedness. Cognitive psychologist Michael Corballis challenges myths about left-handed creativity, while Dr. Srikamakshi Kodandaraman reveals her journey as a left-handed surgeon navigating a right-hand-centric world. Their insights shed light on the complexities and cultural perceptions of left-handed individuals.
AI Snips
Chapters
Books
Transcript
Episode notes
Rarity Explains Left-Handed Persistence
- Left-handedness persists because rarity gives a context-dependent fighting advantage in one-on-one conflicts.
- If lefties became common they would lose that surprise edge and equilibrium would restore minority levels.
Genes Only Partly Explain Handedness
- Left-handedness has a small-to-moderate genetic component and large environmental influences.
- That weak heritability limits how strongly natural selection can act on handedness.
Cultural Stigma In Indian Upbringing
- Dr. Srikamakshi Kodandaraman introduces herself and explains cultural stigma in India where the right hand is 'pure'.
- Family members hit her hand and insisted she use her right hand for religious and eating rituals.
