Feminist philosophy is a substantial and vibrant area of contemporary philosophy. Feminist philosophers critique and also contribute to traditional areas of philosophy such as philosophy of language, epistemology, metaphysics, philosophy of mind, philosophy of science, ethics, political philosophy, and aesthetics. One notable feature of feminist philosophy is its interdisciplinarity. Dialogues between feminist philosophy and other disciplines concern not only gender but also the various forms of oppression and identity that surround race and ethnicity, sexuality, disability, class and economic inequities, and the relations between humanity and non-human animals and the natural environment.