McCoubrey and White said that the question “what is law?” has no simple answer. Glanville Williams said that the meaning of the word “law” depends on the context in which that word is used. He said that, for example, “early customary law” and “municipal law” were contexts where the word “law” had two different and irreconcilable meanings.

The Classical republican concept of “civil society” dates back to Hobbes and Locke. While military organisations have existed as long as government itself, the idea of a standing police force is a relatively modern concept. For example, Medieval England’s system of travelling criminal …