Dr. Joanna Macy, activist, ecologist and author, is one of the pioneers of engaged Buddhism. Her online work includes the article "World as Lover, World as Self"; "Bestiary" (an ode to wildlife); Nuclear Guardianship, her testimony at the World Uranium Hearings in Salzburg, 1992; and The Vegan Vision, on the ethics of a vegan diet. Her other books include Mutual Causality in Buddhism and General Systems Theory: The Dharma of Natural Systems, World as Lover, World as Self and Rilke's Book of Hours.