Supply creates its own demand — a claim that's been fought over for 200 years

Jean-Baptiste Say argued in 1803 that producing goods automatically generates the income needed to buy other goods, so economy-wide overproduction should be impossible. Keynes named it 'Say's Law' specifically to attack it in 1936, arguing demand can collapse during a slump regardless of supply. The disagreement between the two views still divides economists today.

— Jean-Baptiste Say, A Treatise on Political Economy — 1803
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