# Physicalism > **Machine-Evolution Nexus:** [[articles/Digital Darwinism and the Invisible World of Machine Evolution|Digital Darwinism and the Invisible World of Machine Evolution]] supplies constructive evidence that evolutionary organization is not limited to one material implementation while leaving consciousness unresolved. ## Definition **Physicalism** is the family of views holding that everything that exists is physical or depends wholly on the physical. ## Machine and Continuity Context Physicalism permits consciousness to depend on organization realized in a physical computational substrate, but it does not by itself prove substrate independence, identify the necessary organization or settle whether copying preserves a subject. Every digital process remains embodied in hardware, energy and causal infrastructure. ## Relationships [[wiki/Consciousness|Consciousness]], [[wiki/Hard Problem of Consciousness|Hard Problem of Consciousness]], [[wiki/Substrate|Substrate]], [[wiki/Substrate Independence|Substrate Independence]] ## Sources / Provenance - Philosophy of mind and metaphysics; continuity-corpus synthesis.