Global social indicators, as a form of governance and soft regulation, exert pressure for change and compliance through the way they compare and rank the relative performance of states or other units. Is it reasonable then to expect the comparisons they make in the process of carrying out such strategic exercises to be accurate and fair? In particular, how far can they, or should they, be required to be faithful to the requirement to ‘compare like with like’. Using as an example the role of indicators in documenting and responding to the current coronavirus epidemic, I investigate the way their hybrid combination of both comparison and commensuration may help to account for the difficulty they have had so far in establishing stable rankings of best practice.

As Jesuit missionaries in seventeenth-century China struggled to translate Christian theology into Chinese terms and categories, they embarked on a project of purifying the “political” from the “superstitious.” Their project was structured by the unmentionable: the proscribed luxury of silk robes that facilitated the encounters between the missionaries and the native elite they most sought to convert. This article examines the manifold functions of silk and the problem of “accommodation” by turning to the Brevis relatio de numero et qualitate Christianorum apud Sinas (“Brief report on the number and quality of Christians in China”), a booklet authored by the Jesuit missionary Martino Martini (1614–1661). Written for European circulation, the Brevis relatio touted the triumphs of the mission by incorporating the conceptual imaginary of “China” into the cosmo-political confines of the Euro-Christian world. This article shows how the basic Christian metaphor of horticultural fruitfulness was used to interpret silk and sericulture as material evidence that the Chinese mission field prefigured and promised, both spiritually and commercially, a profitable harvest.

The Celtic-speaking town of Lattara (modern Lattes) in Iron Age southern Gaul was an important centre of sustained colonial interaction with Etruscans, Massalian Greeks and Romans from the sixth century B.C. One of the important consequences of these encounters was the introduction of coinage. Through an examination of the archaeological context of coins, I investigate how the use and value of money changed at Lattara after the Roman conquest. Drawing upon several anthropological discussions of money in colonial settings, particularly Jean and John Commaroff's (2006) notion of ‘commensuration’, I suggest that the incorporation of coinage into transaction systems at Lattara was related to its expedience as a standardized form of value, which facilitated exchange between the inhabitants of the town and foreign merchants.

In Archaeological dialogues 12.2 Jean and John Comaroff explored the role of commensuration – the mechanisms that render equitable and negotiable different orders of value – in the production of society and history. While equilibration, standardization and conversion are implicated in most theories of money and commodification, their nature as social processes has not been adequately specified, above all in the construction of universalizing ideologies and modernist political and economic regimes. They pursue these processes in relation to one African theatre, examining the ways in which different regimes of value, brought up against one another in the encounter between the southern Tswana peoples and European colonizers, became the subject of both conflict and complex mediation. Cows, coin and contracts – which had the capacity to construct and negate difference – soon were invested here with magical qualities. But colonized peoples were also sensitive to the capacity of such currencies to enable or impede convertibility, and to the forms of abstraction and incorporation they permit. Which is why, in South Africa and elsewhere, those currencies often became metonymic of the contestations of value on which colonial struggles, tout court, were played out.

In this short essay they respond to the comments on their article by John Creighton and Laurier Turgeon.

This essay explores the role of commensuration – the mechanisms that render equitable and negotiable different orders of value – in the production of society and history. While equilibration, standardization and conversion are implicated in most theories of money and commodification, their nature as social processes has not been adequately specified, above all in the construction of universalizing ideologies and modernist political and economic regimes. We pursue these processes in relation to one African theatre, examining the ways in which different regimes of value, brought up against one another in the encounter between the southern Tswana peoples and European colonizers, became the subject of both conflict and complex mediation. Cows, coin and contracts – which had the capacity to construct and negate difference – soon were invested here with magical qualities. But colonized peoples were also sensitive to the capacity of such currencies to enable or impede convertibility and the forms of abstraction and incorporation they permit. Which is why, in South Africa and elsewhere, those currencies often became metonymic of the contestations of value on which colonial struggles, tout court, were played out.