David Ricardo：On the Principles of Political Economy and Taxation, Excerpt 18

If we suppose the occupations of the society extended, that some provide canoes and tackle necessary for fishing, others the seed and rude machinery first used in agriculture, still the same principle would hold true, that the exchangeable value of the commodities produced would be in proportion to the labour bestowed on their production; not on their immediate production only, but on all those implements or machines required to give effect to the particular labour to which they were applied.

Source： https://www.gutenberg.org/ebooks/33310
Locator：Excerpt 18 · Verified：2026-10-19 · Verification：Short excerpt

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