You're addressing a throwaway line in this article and a point I explain at greater length in other articles. It's not all of nature that's organized into a pyramidal structure, but the part of nature in which social power is relevant: the animal kingdom. The point is that social species tend to organize themselves into dominance hierarchies.

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store