Green Mass is a meditation on--and with--twelfth-century Christian mystic and polymath Saint Hildegard of Bingen. Attending to Hildegard's vegetal vision, which greens theological tradition and imbues plant life with spirit, philosopher Michael Marder uncovers a verdant mode of thinking. The book stages a fresh encounter between present-day and premodern concerns, ecology and theology, philosophy and mysticism, the material and the spiritual,...