The theory of representative government rests on the principle that man is a rational being, i.e., that he is able to perceive the facts of reality, to evaluate them, to form rational judgments, to make his own choices, and to bear responsibility for the course of his life.
Politically, this principle is implemented by a man’s right to choose his own agents, i.e., those whom he authorizes to represent him in the government of his country. To represent him, in this context, means to represent his views in terms of political principles. Thus the government of a free country derives its “just powers from the consent of the governed.” (For the basis of this discussion, see “Man’s Rights” and “The Nature of Government” in Capitalism: The Unknown Ideal.)
As a corroboration of the link between man’s rational faculty and a representative form of government, observe that those who are demonstrably (or physiologically) incapable of rational judgment cannot exercise the right to vote. (Voting is a derivative, not a fundamental, right; it is derived from the right to life, as a political implementation of the requirements of a rational being’s survival.) Children do not vote, because they have not acquired the knowledge necessary to form a rational judgment on political issues; neither do the feeble-minded or the insane, who have lost or never developed their rational faculty. (The possession of a rational faculty does not guarantee that a man will use it, only that he is able to use it and is, therefore, responsible for his actions.)