Hobbes offers his most extended analysis of the linked concepts of authorisation and representation in chapter xvi of Leviathan, the chapter in which he rounds off Part I, 'Of Man', and paves the way for his discussion 'Of Commonwealth' in Part II. This pivotal chapter, 'Of persons, authors, and things Personated', has no counterpart in either of the earlier recensions of his civil philosophy. Nothing like it can be found in The Elements of Law, which he had circulated in manuscript in 1640, nor in De Cive, which he had published in 1642. Hobbes never speaks in these texts of representation or representatives, nor of the underlying suggestion that it is possible to serve as an 'author' who can authorise the performance of an action by someone else. By contrast, in Leviathan these concepts form the bedrock of Hobbes's theory of the legitimate state, and in the Latin version of 1668 he was content to offer a simplified version of essentially the same argument.

Deploying his preferred method of beginning with definitions, Hobbes opens his analysis in chapter xvi without preamble as follows: