ceinvestigation of cause-and-effect for degradation and soil erosion

Environmental history is a multidisciplinary enterprise united by shared interests in ecological change and the complex interactions between people and the environment. Its practitioners include expertise in the natural sciences, in history or archaeology, or in political ecology and related social sciences; but there is no agreement on a common agenda and limited success in bridging methodological and epistemological divisions that impede integrative and interdisciplinary research. World-systems history and environmental history also have overlapping interests in long-term change and matters of sustainability. The Mediterranean world sustained agricultural lifeways across some 8000 years, yet its environment has repeatedly been described as degraded, suggesting conceptual confusion between transformation and destruction. This paper is didactic in purpose and uses landscape histories for the Peloponnese and eastern Spain to show that the impact of recurrent, excessive precipitation events and of reduced quality of land cover are difficult to unravel, because they commonly appear to work in tandem. As a result (a) environmental change cannot be assumed or ‘‘predicted’’, but must be studied inductively by experts with science skills, and (b) cause-and-effect relationships demand an understanding of ecological behavior, for which humanistic insights are indispensable. Social science models highlight systemic relationships from socioeconomic and structural perspectives, but are less suited to deal with the complexity of environmental change or the contingencies exemplified by human resilience. Near Eastern, Greek and Roman agronomic writings offer elite ‘‘voices’ ’ that speak to cumulative technological change, scientific understanding, and the context o