The animal in front of you must know where it stands, whether above you or below you. Social rank is central to how it leads its life. Rank determines whom it can associate with and how; where and when it can eat; where it can rest; where it can drink; and so on. Until it knows its rank for certain, the animal lives a life of unbearable anarchy. It remains nervous, jumpy, dangerous. Luckily for the circus trainer, decisions about social rank among higher animals are not always based on brute force. (1.13.3)