%0 Journal Article %A Albrecht Classen %D 2025 %C Berlin, Germany %I Peter Lang Verlag %J Mediaevistik %@ 2199-806X %N 1 %V 38 %T Annette Kehnel, The Green Ages: Medieval Innovations in Sustainability. Trans. from the German by Gesche Ipsen. Waltham, MA: Brandeis University Press, 2024, 342 pp., 45 b/w ill. %R 10.3726/med.2025.01.05 %U https://www.peterlang.com/document/1673032 %X While I am writing this review, Annette Kehnel is about to publish a new book (Sept. 2024, Die sieben Todsünden: Menschheitswissen für das Zeitalter der Krise) in which she appears to pick up the notion of the Seven Deadly Sins as a fundamental teaching for humankind today facing a global crisis. Those seven vices are, indeed, universal shortcomings in human life, and Kehnel suggests, as I have already done in the past (Wisdom from the European Middle Ages, 2022; or see my blog, “Seven Deadly Sins in Politics, no less and no more,” Elephant Journal, online at: %K annette, kehnel, green, ages, medieval, innovations, sustainability, trans, german, gesche, ipsen, waltham, brandeis, university, press