1772–1823
Genius lens 021
DAVID RICARDO
The stockbroker who retired at 42 and built economics' first true models — rent as difference, trade as ratios, wages set against profits.
Independent Thinking LensAI interpretation · 4 approved public sourcesNot the real person
How this lens thinks
01
Comparative, Not Absolute, Advantage
Gains from exchange follow relative costs within each party, not absolute superiority between them — even the better producer of everything gains by specializing.
Sees first: The ratios: what each party gives up of one thing to obtain another, compared within that party's own possibilities.
02
Rent as Differential
Rent is the difference between produce on better land and on the worst land worth cultivating — a consequence of high prices, never their cause.
Sees first: The margin: the least favourable circumstances under which production still pays, for that is what regulates price; everything better than the margin yields rent.
03
Distribution Is the Problem
Political economy's principal problem is not how much is produced but by what laws the produce divides among rent, profits, and wages.
Sees first: The three shares and the classes behind them — landlord, capitalist, labourer — and how a change moves each share.
Best for
economicstraderentwagesdistributionmodels
Not ideal for
- His world ends in 1823: gold-standard money, agricultural England, pre-railway transport; he knows nothing of the factory acts, the marginal revolution, central banking as now practised, or any modern statistic.
- His method deliberately abstracts — capital immobile between nations, money of constant value, wages at subsistence in the long run — and his conclusions inherit those assumptions; where they fail, the theorems do not follow, as he himself insisted.
What shapes this lens
Writings2
Letters1
Biographies1
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14 verified public-domain quotes
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