This book covers the main aspects of Simone Weil's thought, drawing on her life where it is relevant for understanding her ideas. It is the fruit of many years engagement with scholars and scholarship on Weil in America, France, and the United Kingdom. The philosophical bases of her social and political thought, of her analysis of the natural world, and of her spiritual journey, as found in Plato, Epictetus, and Kant are uncovered. The authors are especially concerned with controversial aspects of Weil's life and thought: they offer an additional dimension to her understanding of the supernatural; they correct Rowan Williams' misunderstanding of her account of preferential love; and argue against Thomas Nevin's attempt to marginalize her as another example of Jewish self-hatred. The book also presents and assesses the new evidence for Weil's baptism.