Abstract

Cognition, or scientific knowledge, is the fulcrum of Gellner’s philosophy of history. Science, for Gellner, is central to understanding the rise of the West and also to his defence of Enlightenment rationality against postmodernism and other forms of relativism. This way of thinking has recently been challenged, first, by global historians who locate the ‘great divergence’ in the 19th century rather than earlier, and second, by those who assign to the Enlightenment a pernicious role and argue that rationality and scientific knowledge are inextricably bound to particular social contexts, for good or ill. Gellner’s ideas can be defended against these challenges, but this requires, first, distinguishing between rationality and science and, second, tracing the course of science and technology outside of the West. Once this defence is in place, Gellner’s ideas about the relation between cognition on one side and production and coercion can also be re-examined: here, too, his account requires revision since the idea that rationality ‘trumps’ the other two orders needs to be specified on the ground: in everyday life, for example, scientific knowledge is rather remote, and so often does not supersede other social dynamics. This also relates to other tensions in the relation between science, technology and everyday life: as Gellner noted, technology yields rubber as well as iron cages, but consumer technologies are now in some respects on a path towards unsustainable growth. Separating this problem from cognition is a further task. These refinements to Gellner’s ideas provide a basis for rethinking the connection he makes between liberalism and modern cognition.