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208 pages, Paperback
First published January 1, 2023
"Beyond soil and wood, stone, clay and dust, iron and other metals, air, fire and water, there is a metamorphic force that animates earthly matter, a force that gives it a certain consistency, solidity and stability. The same life force, which is both strength and energy, is at the origin of its substances. These substances, hard, soft, fluid, volcanic, or airy, mobile or immobile, sometimes volatile, often scorching hot or icy cold, and always elusive, have awakened in humans what Gaston Bachelard called "muscular joys," and that is also the other name we can give to technological action, which, at least in ancient Africa, was never separate from that other organ, namely the word. Therefore, if we speak of the evolution of the earth, we must also consider the evolution of technology, and thus the connections between the human species and the totality of living things."