Mary Midgley is one of the most important moral philosophers working today. Over the last thirty years, her writings have informed debates concerning animals, the environment and evolutionary theory. The invited essays in this volume offer critical reflections upon Midgley¿s work and further developments of her ideas, and include topics such as the moral status of animals, the concept of wickedness, science and mythology, the Gaia Hypothesis, Midgley¿s relationship to modern moral philosophy, and her work with Irish Murdoch, along with the first complete bibliography of Midgley¿s writings.