Hierarchy.

Dominance hierarchies (sometimes called "pecking orders") are virtually universal in social species, including humans. In most species and in ancestral and early human societies, these hierarchies allocate scarce resources, including food and often access to females. Humans sometimes use hierarchies for these allocational purposes, but humans use hierarchies for productive purposes as well-as in firms, universities, and governments. Productive hierarchies and dominance hierarchies share many features. As a result, people, including students of human behavior, often confuse types of hierarchies. For example, the Communist Manifesto attributes features to productive hierarchies that are actually characteristic of dominance hierarchies. Government hierarchies are particularly confusing, as they have many features of both types. In modern societies with socially mandated monogamy and voluntary attachment to hierarchies in the form of competitive labor markets, productive hierarchies are generally useful for all members, and it is important not to confuse the two types, either in policy or in scientific analysis.