Fischer-Kowalski and Haberl provide a historical-material vocabulary for treating societies as organised regimes of material and energetic exchange. Socio-economic metabolism names the throughput by which social systems take in resources, maintain stocks and release wastes; colonization names the deliberate transformation of natural systems so that they perform according to social purposes. The conceptual power of the paper lies in holding these two operations together. Metabolic scale cannot be understood apart from the labour, institutions, technologies and cultural norms that make specific forms of colonization possible, while environmental transformation cannot be treated as an external side effect of an otherwise autonomous economy. Their comparative method moves across hunter-gatherer, agrarian and industrial regimes, relating changes in energy and material throughput to shifts in labour intensity and ecological intervention. The bridge to industrial ecology and social ecology is exact: sustainability requires changing characteristic metabolic profiles, not simply substituting technologies within an unchanged social demand for ever-higher material throughput.
