Murray N. Rothbard, “Catallactics”

Rothbard’s historical dictionary article, originally published in 1987 and republished in the 2008 second edition of The New Palgrave Dictionary of Economics, traces the conception of economics as the science of exchanges. Its chronological account turns on two conceptual shifts: from material wealth to subjective valuation, and from exclusively interpersonal exchange to market analysis grounded in a broader science of purposeful human action.

Richard Whately proposed “catallactics” in his 1831 Oxford lectures partly to answer the charge that political economy’s concern with wealth made it materialistic and incompatible with Christianity. Rothbard treats this terminological intervention as a substantive redefinition of the discipline:

Focusing on human acts of exchange rather than on the things being exchanged, Whately was led almost immediately to a subjective theory of value, since he saw that 'the same thing is different to different persons' (p. 8) and that differences in subjective value are the foundation of all exchanges.

Economics thereby takes exchanging persons, rather than wealth as an aggregate of things, as its starting point. Whately institutionalized this approach through the chair he supported at Trinity College, Dublin. Rothbard contrasts James Anthony Lawson’s study of exchanging man with John Stuart Mill’s wealth-seeking “economic man,” but notes that Lawson’s return to discussions of wealth exposed the early school’s incomplete conceptual emancipation.

Henry Dunning Macleod made catallactics a self-conscious school and extended its scope beyond tangible objects:

Stressing value as the result of a subjective desire of the mind, Macleod furthered the emancipation of economics from material wealth by showing that immaterial goods or services are also subjects of exchange.

Macleod also reconstructed the school’s ancestry through Condillac, whose account explained exchange by each participant’s preference for what was received over what was surrendered. Mutual gain thus follows from differing valuations, not from an increase in material things. Rothbard presents Arthur Latham Perry as the culmination of this tradition: Perry removed “wealth” from economics altogether and substituted “property” for saleable things whose value still required estimation.

The article’s final movement distinguishes two ways of broadening exchange beyond transactions between persons. The early Schumpeter treated exchanges as formal changes in quantities, deliberately excluding purposeful motives. Rothbard criticizes this mechanistic reconstruction but credits it with allowing the isolated individual of “Crusoe economics” back into analysis, since such an individual can rearrange goods without trading with anyone.

It remained for Ludwig von Mises (1949) to bring back the term catallactics in his treatise on economics, and to broaden it by embedding its analysis of the market, or the science of exchanges, in the wider discipline of ‘praxeology’, the science of human action.

Mises supplies Rothbard’s preferred resolution: market exchange remains a distinct field, while its foundations lie in the more general allocation of resources toward valued ends. Crusoe’s conduct becomes intelligible as purposeful action and as the replacement of a present condition by a more satisfying one. The article’s relevance is therefore methodological as well as historical: its genealogy shows how definitions of economics determine whether services, subjective gains, and solitary resource use fall within the discipline’s explanatory reach.