Ebook: Exzerpte und Notizen Februar 1864 bis Oktober 1868, November 1869, März, April, Juni 1870, Dezember 1872

Volume IV/18 publishes for the first time five notebooks and five excerpted volumes by Marx from the period 1864–1868 on agriculture, agricultural chemistry, the agrarian system, and economic rent theory. The heart of the volume focuses on "ecological" questions related to soil depletion, climate change, and the limits of natural resources, which Marx links to the increasingly capitalist management of agriculture.