This Oxford Handbook engages with the work of women philosophers spanning the long nineteenth century in the German tradition. It investigates women's contributions to key philosophical areas such as epistemology and metaphysics, aesthetics, ethics, social and political philosophy, ecology, education, and the philosophy of nature and examines their role in the formation and development of major philosophical moments, including romanticism and idealism, socialism, Marxism, Nietzscheanism, feminism, phenomenology, and neo-Kantianism.