Martin Hollis — Rationalism, the Epistemological Unity of Mankind, and the Philosophy of Social Science (1938–1998)

James Martin Hollis was an English rationalist philosopher — born in London on 14 March 1938, the son of a diplomat and nephew of MI5 Director-General Roger Hollis, educated at Winchester, who did national service in the Royal Artillery, read PPE at New College Oxford from 1958 to 1961 (First Class), held a Harkness Fellowship at Berkeley and Harvard from 1961 to 1963 — encountering sociology in California, falling under the influence of Quine in Cambridge, and encountering the early work of Rawls — passed the civil service examination top of the entire cohort, joined the Foreign Office in 1963, was sent to Heidelberg to learn German, returned to find himself posted to Moscow, quit — "the last straw for a rational man" — and joined the new University of East Anglia in 1967, where he remained until his death on 27 February 1998. He became Professor in 1981, edited Ratio from 1980 to 1987, and was Pro-Vice-Chancellor from 1992. He was also a Justice of the Peace for ten years, a chess player of very high standard, a competitive bridge player, a designer of logic puzzles, and a prolific contributor of puzzles to publications including New Scientist.

His major works were "Models of Man" (1977), "Rationality and Relativism" (1982, edited with Steven Lukes), "The Cunning of Reason" (1988), "Philosophy of Social Science: An Introduction" (1994), and the posthumously published "Trust within Reason" (1998). He was described, in the memorial volume devoted to his work, as "arguably the most incisive, eloquent and witty philosopher of the social sciences of his time."

His central concern, pursued across thirty years with unwavering steadiness: that rationality was not culturally relative but universal — that there was an "epistemological unity of mankind" grounding the possibility of understanding across cultures and across individuals — and that this universal rationality was richer than the thin, instrumental rationality of economic theory and rational choice. Reason, properly understood, extended to the evaluation of ends, to norms, to trust, and to the common good — not merely to the efficient pursuit of given preferences.

The Epistemological Unity of Mankind — Against Relativism

The foundational commitment of Hollis's philosophy was the "epistemological unity of mankind" — the claim, drawn from Strawson's "Individuals," that there was "a massive central core of human thinking which has no history": a set of perceptual and conceptual capacities shared by all human beings who could understand one another at all. Some beliefs were universal not because every culture happened to share them but because they were necessary preconditions of intelligibility itself. Any account that made two cultures genuinely incommensurable — that denied the possibility of understanding across their boundaries — had to explain how the anthropologist had managed to understand the culture she was calling incommensurable. Genuine incommensurability was self-refuting.

This was Hollis's primary challenge to relativism — a position he engaged with throughout his career, most directly in "Rationality and Relativism" (1982), edited with Steven Lukes, which brought together philosophers, sociologists of science, and anthropologists across the range of positions on the rationality debate. His own position was consistently against relativism — not because he denied cultural difference but because he insisted that cultural difference was always intelligible from a shared rational standpoint that was itself not culturally variable.

"Central to Hollis's rationalism was 'the epistemological unity of mankind' — the view that 'some beliefs are universal... There are, because there have to be, percepts and concepts shared by all who can understand each other.'"

— Timothy O'Hagan, obituary in The Independent

Models of Man — The Two-by-Two Matrix of Social Theory

"Models of Man" (1977) was Hollis's first and most influential book — an examination of the implicit conceptions of human nature embedded in sociology, economics, and psychology, and an argument for a better model of his own. Every social theorist, he argued, had a "model of man" — a metaphysical view of human nature that required its own epistemology. The dominant models fell into two camps: passive models (that made human beings plastic products of nature and nurture, determined by social forces or biological drives) and active models (that stressed autonomous self-creation and rational agency). Each had characteristic strengths and characteristic failures. Passive accounts had a robust notion of causal explanation but couldn't find a self to apply it to — the self dissolved into the forces that determined it. Active accounts rightly stressed autonomous agency but lacked a proper concept of scientific explanation.

His famous two-by-two matrix organized social theory by crossing two distinctions: between explanation (causal) and understanding (interpretive), and between individualism and holism. This produced four approaches to social inquiry — individualist-explanation, holist-explanation, individualist-understanding, holist-understanding — each illuminating a different dimension of social life and each facing characteristic problems. Hollis's own position developed from this matrix: social action had to be understood in terms of the reasons agents had for it, not merely explained by causes operating on them — and this required a conception of rational agency that was neither the thin instrumentalism of economics nor the social constructivism of relativist sociology.

"All social theorists who seek to explain human action have a 'model of man' — a metaphysical view of human nature that requires its own theory of scientific knowledge. Hollis examines the tensions from differing views of sociologists, economists, and psychologists, developing a rationalist model of his own which connects personal and social identity through rational action and a priori knowledge, allowing humans to both act freely and still be a subject for scientific explanation."

The Cunning of Reason — Against Homo Economicus

"The Cunning of Reason" (1988) was Hollis's most sustained attack on the rational choice theory that had come to dominate not only economics but political science, sociology, and much of social theory. He began with an admirably clear presentation of rational choice theory and game theory, showing precisely what they claimed and what they required: that desire, not belief, was the only motor of action; that efficient choice was unconcerned with the ends pursued; and that belief was assimilated to information and deliberation to its processing. The agent was "simply a throughput" — a computing unit that processed inputs (preferences, information) into outputs (choices).

He then challenged all three assumptions at length. The decision-theoretic model could not account for trust or morality — for the phenomena in which people acted from principle rather than from calculation of consequences. Games like the Prisoner's Dilemma, which rational choice theory treated as demonstrations of the limits of self-interest, were in fact evidence that human rationality included a concern for the common good that instrumental reason could not reduce. The paradoxes of rational choice — free-rider problems, voting paradoxes, collective action dilemmas — were not failures of rationality but evidence that the model of rationality employed by economic theory was incomplete. A richer notion of reason, one that included the assessment of ends and the rationality of norms and social roles, was needed to account for the phenomena rational choice theory left unexplained.

"The Cunning of Reason shows how rational choice theory presumes desire, rather than belief, as the only motor of action; that the theory of efficient choice is unconcerned with the ends pursued; and that belief is assimilated to information. He then challenges all three presumptions, arguing that the decision-theoretic model cannot account for the phenomena of trust and morality."

— British Academy memoir

Trust within Reason — The Common Good as Rational

Hollis's posthumously published "Trust within Reason" (1998) was the most direct statement of his positive alternative to instrumental rationality. Against the view that truly rational agents were inherently self-interested — and that trust was therefore at best a calculated risk, at worst irrational — he argued that trust was grounded in a richer, deeper notion of reason founded on reciprocity and the pursuit of the common good. The apparently irrational act of trusting someone who might defect was not irrational in any comprehensive sense — it was rational from the standpoint of a reason that extended beyond the individual's immediate self-interest to the maintenance of the social conditions that made individual flourishing possible.

This argument reconstructed the Enlightenment idea of "citizens of the world" — rational individuals who found their identity simultaneously in multiple commitments to communities both local and universal — as a philosophically defensible position rather than a sentimental aspiration. Reason, properly understood, did not put the individual against the community. It situated the individual within communities of reciprocal commitment and showed that this situation was both rational and constitutive of personal identity.

"With the help of game theory, Martin Hollis argues against the narrow, egocentric definition of rationality and in favour of a richer, deeper notion of reason founded on reciprocity and the pursuit of the common good. Within that framework he reconstructs the Enlightenment idea of citizens of the world, rationally encountering and finding their identity in their multiple commitments to communities both local and universal."

Explanation and Understanding — The Double Demand of Social Science

Running through all Hollis's work was a distinction between explanation (causal account, from the outside) and understanding (interpretive account, from within) — drawn originally from Dilthey's distinction between Erklären (the method of natural science) and Verstehen (the method of the human sciences). Hollis's version of the distinction was more nuanced than Dilthey's: he did not simply insist that social science must be interpretive and could not be causal. He argued that both were necessary and that the philosophical challenge was to show how they could be integrated without reducing either to the other. The social sciences faced a "double hermeneutic" — they had to interpret agents who were themselves interpreters — and this made them irreducibly different from the natural sciences without making them merely subjective.

His "Philosophy of Social Science: An Introduction" (1994) presented these questions with characteristic clarity — structured around the tensions between systems-and-forces versus meanings-and-practices, rational behavior versus self-expression, and explanation-from-without versus understanding-from-within — and remains one of the best introductions to the field in English.

"Radical interpretation is simply the stuff of human life; and the social sciences are radical interpretation on stilts."

— New Society, reviewing Models of Man

Legacy — The Philosopher as Citizen

Hollis was unusual among analytic philosophers of his generation in the breadth of his institutional commitments — justice of the peace, university administrator, editor of a philosophical journal — all pursued alongside serious scholarship with what the British Academy memoir described as "a remarkable combination of intensity and steadiness." His interest in games was not merely recreational: it was a direct expression of his philosophical interest in rationality, choice, and the paradoxes that arise when rational individuals interact. The puzzles he designed for New Scientist, the bridge tournaments he competed in, and the game theory he used to probe the foundations of social science were all expressions of the same intelligence.

"At the heart of all his work was a passionate and unwavering rationalism. Starting from the assumption that there is an 'epistemological unity of mankind', he devoted his scholarly energies to exploring the meaning and scope of rationality. His commitment to the ideal of rationality was so fervent as sometimes to seem unreasonable. As always, he merely relished the irony."

— British Academy memoir