The Archeology of Knowledge

For many years now historians have preferred to turn their attention to long periods, as if, beneath the shifts and changes of political events, they were trying to reveal the stable, almost indestructible system of checks and balances, the irreversible processes, the constant readjustments, the underlying tendencies that gather force, and are then suddenly reversed after centuries of continuity, the movements of accumulation and slow saturation, the great silent, motionless bases that traditional history has covered with a thick layer of events. The tools that enable historians to carry out this work of analysis are partly inherited and partly of their own making: models of economic growth, quantitative analysis of market movements, accounts of demographic
expansion and contraction, the study of climate and its long-term changes, the fixing of sociological constants, the description of technological adjustments and of their spread and continuity. These tools have enabled workers in the historical field to distinguish various sedimentary strata; linear successions, which for so long had been the object of research, have given way to discoveries in depth. From the political mobility at the surface down to the slow movements of `material civilization', ever more levels of analysis have been established: each has its own peculiar discontinuities and patterns; and as one descends to the deepest levels, the rhythms become broader. Beneath the rapidly