Philosophy of mind is a vast subject, covering the criss-crossing areas of consciousness, subjectivity, personhood, personal identity, thought, cognition, action, emotion, free will and responsibility, transcendence, authenticity and death. It has interfaces with, inter alia, psychology, philosophy of psychology, moral philosophy, philosophy of language, theories of human nature, philosophy of religion, feminism and the philosophy of sport. Luminaries and major influences include Plato, Descartes, Wittgenstein, Hegel, Spinoza, Brentano, Husserl, Heidegger, Sartre, Merleau-Ponty, Davidson, Putnam, Lewis, Strawson, Nagel, Searle, Dennett, Flanagan, Chalmers, Clark and Hurley.