Book excerpt: Marxism in the Age of Ecological Catastrophe offers a stimulating discussion on the ecological unfeasibility of capitalist society. Divided into three parts, Eduardo Sá Barreto begins by providing a reconstruction of Marx’s theory of value and articulating it into a ecological critique of this society. Part Two surveys key debates between some of today's most representative Marxist ecologists. Part Three explores political approaches, tactical and strategic issues to see whether they align with the gravity of the challenges facing humanity or not. Located at the intersection of the natural and social sciences, Marxism in the Age of Ecological Catastrophe will be of interest to scholars of political science, economics, ecology, climatology, demography, geography, and sociology.