 Lady Anne Conway (nee Anne Finch) was one of a tiny minority of seventeenth-century women who was able to pursue an interest in philosophy. She was associated with the Cambridge Platonists, particularly Henry More (1614–1687). Her only surviving treatise, Principles of the Most Ancient and Modern Philosophy, was published posthumously and anonymously in 1690. This propounds a vitalist ontology of spirit, derived from the attributes of God, which she sets out in opposition to More, Descartes, Hobbes and Spinoza. Her philosophy was received favorably by Leibniz.