Man, it will be objected, is a living being, and therefore belongs in the first place to the domain of the biologist; but he is also a thinking being, and therefore belongs to the psychologist; in his evolutionary setting, he is the concern of the palaeontologist; but he is also a being capable of philosophizing, capable of artistic and religious feelings, and so comes within the province of the philosopher, the artist, and the theologian. But what on earth is a physicist doing in this company? What does he know about man, since man is not his special field of research?
If I must make my...