
IEA Podcast Made in Britain: The 500-Year Story Behind the Industrial Revolution | IEA Interview
Mar 30, 2026
Dr. Gregory Clark, economics professor and author known for long-run economic history, discusses why growth stalled before 1800. He explores how higher surviving fertility among wealthier families slowly reshaped behavior over centuries. Topics include falling interest rates, rising literacy, changing marriage patterns, and why Britain, unlike other societies, moved toward industrialisation.
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Wealthy Families Drove Generational Change
- Pre-industrial England showed a persistent fertility advantage for the wealthy, with upper classes having about 4–5 surviving children versus about 2 for the poor.
- That demographic pressure caused the upper-middle classes to expand each generation, correlating with falling interest rates, rising literacy, and declining violence long before industrialisation.
High Medieval Interest Rates Reveal Behavioral Puzzle
- England's safe loan interest rates were about 10% in the medieval period, indicating huge returns were available but not pursued by most people.
- Over centuries interest rates declined as society shifted toward patience, rising literacy, and lower violence, reflecting behavioural change not just institutions.
Self Domestication Shaped Modern Behaviour
- Clark proposes 'self-domestication' where stable market societies favored traits (cultural or genetic) of economically successful people over millennia.
- This selection potentially explains long-term declines in violence and increases in commercial behaviours preceding the Industrial Revolution.






