to such an idea, evidenced by a passage in his Prior Analytics:

The first systematic physiognomic treatise is a slim volume, [[Physiognomonica]] (Physiognomonics), ascribed to Aristotle, but probably of his "school", rather than created by Aristotle himself. The volume is divided into two parts, conjectured as originally two separate works. The first section discusses arguments drawn from nature and describes other races (non-Greek) and concentrates on the concept of human behavior. The second section focuses on animal behavior,