In philosophy, panpsychism is the view that consciousness, mind or soul () is a universal and primordial feature of all things. Panpsychists see themselves as minds in a world of mind.
Panpsychism is one of the oldest philosophical theories, and has been ascribed to philosophers like Thales, Parmenides, Plato, Averroes, Spinoza, Leibniz and William James. Panpsychism can also be seen in ancient philosophies such as Stoicism, Taoism, Vedanta and Mahayana Buddhism. During the 19th century, panpsychism was the default theory in philosophy of mind, but it saw a decline during the middle years of the 20th century with the rise of logical positivism. The recent interest in the hard problem of consciousness has revived interest in panpsychism.
The term "panpsychism" has its origins with the Greek term pan ( : "all, everything, whole") and psyche (: "soul, mind") as the unifying center of the mental life of us humans and other living creatures." Psyche comes from the Greek word ψύχω (psukhō, "I blow") and can mean life, soul, mind, spirit, heart and 'life-breath'. The use of psyche is controversial due to it being synonymous with soul, a term usually taken to have some sort of supernatural quality; more common terms now found in the literature include mind, mental properties, mental aspect, and experience.
Early forms of panpsychism can be found in pre-modern animistic beliefs in religions such as Shinto, Taoism, Paganism and shamanism. Panpsychist views are also a staple theme in pre-Socratic Greek philosophy. According to Aristotle, Thales (c. 624 – 545 BCE) the first Greek philosopher, posited a theory which held "that everything is full of gods." Thales believed that this was demonstrated by magnets. This has been interpreted as a panpsychist doctrine. Other Greek thinkers that have been associated with Panpsychism include Anaxagoras (who saw the underlying principle or arche as nous or mind), Anaximenes (who saw the arche as pneuma or spirit) and Heraclitus (who said "The thinking faculty is common to all").