The second view, which may be called the Social Contract theory proper, regards society as originating in, or based on, an agreement between the individuals composing it. It seems to be found first, rather vaguely, in Richard Hooker’s Ecclesiastical Polity , from which Locke largely borrowed: and it reappears, in varying forms, in Milton’s Tenure of Kings and Magistrates , in Hobbes’s Leviathan , in Locke’s Treatises on Civil Government , and in Rousseau. The best-known instance of its actual use is by the Pilgrim Fathers on the Mayflower in 1620, in whose declaration occurs the phrase, “We do solemnly and mutually, in the presence of God and of one another, covenant and combine ourselves together into a civil body politic.” The natural implication of this view would seem to be the corollary of complete popular Sovereignty which Rousseau draws. But before Rousseau’s time it had been used to support views as diverse as those which rested on the first form. We saw that, in Grotius’s great work, De Jure Belli et Pacis , it was already possible to doubt which of the two theories was being advocated. The first theory was, historically, a means of popular protest against royal aggression. As soon as popular government was taken into account, the act of contract between people and government became in effect merely a contract between the individuals composing the society, and readily passed over into the second form.
The second theory, in its ordinary form, expresses only the view that the people is everywhere Sovereign, and that, in the phrase of Milton’s treatise, “the power of kings and magistrates is only derivative.” Before, however, this view had been worked up into a philosophical theory, it had already been used by Hobbes to support precisely opposite