 While there is a strong voluntarist line of thought in Christian political philosophy, it was in the 17th century that consent came to be seen as the main source of political legitimacy. The works of Hugo Grotius, Hobbes, and Samuel Pufendorf tend to be seen as the main turning point that eventually led to the replacement of natural law and divine authority theories of legitimacy (see Schneewind 1998; Hampton 1998). The following passage from Grotius’ On the Law of War and Peace expresses the modern perspective: “But as there are several Ways of Living, some better than others, and every one may chuse which he pleases of all those Sorts; so a People may chuse what Form of Government they please: Neither is the Right which the Sovereign has over his Subjects to be measured by this or that Form, of which divers Men have different Opinions, but by the Extent of the Will of those who conferred it upon him” (cited by Tuck 1993: 193). It was Locke’s version of social contract theory that elevated consent to the main source of the legitimacy of political authority.