 (1) Physicalism. Many pantheists argue that physical conceptions are adequate to explain the entire cosmos. This is an ancient form of pantheism, found for example in the Stoics, for whom only bodies can be said to exist. Soul they understood as nothing more than a specific form of pneuma, or breath, the active power to be found throughout nature. This is also a form of pantheism popular today—often termed, scientific or naturalistic pantheism. Such worldviews make no ontological commitments beyond those sanctioned by empirical science.