Consciousness is nothing but the brain's activity: mental states are physical states that science will one day identify. There is no residual mystery, only complexity still poorly understood.
The soul is corporeal: an assembly of very fine atoms that dissolves at death like the rest. Thought and sensation are material processes, with nothing immortal or immaterial.
Epicurus, Letter to Herodotus; Lucretius, On the Nature of Things, III
Foundations and implications
↑ What grounds itA leaf — an application that grounds nothing further here.
↑ What grounds it
Nature of reality
If everything that exists is material, consciousness can only be a property of the brain: mental states are physical states that science will eventually identify. Materialism thus leads to reductive physicalism, which denies mind any reality distinct from neural activity.
↓ What it implies
A leaf — an application that grounds nothing further here.