And people have not realized it. Often, when I read a text on the question of consciousness by defenders of physicalism, especially reductive physicalism, this passage of Nietzsche comes to my mind.

For this reason, the word "physicalism" is often used interchangeably with the word "materialism." Both terms hold that the real world consists only of matter and energy, and that all organic and ...

The next three chapters discuss dualism, physicalism, and some hard problems for physicalism, especially those concerning phenomenal consciousness. Chapters on behaviourism and functionalism follow.