 Thinkers of the French Enlightenment argued for toleration on various grounds and, as in Bodin, there was a difference between a focus on political stability and a focus on religious coexistence. In his On the Spirit of the Laws (1748), Montesquieu argues for the toleration of different religions for the purpose of preserving political unity and peace, yet he warns that there is a limit to the acceptance of new religions or changes to the dominant one, given the connection between a constitution and the morality and habits of a people. In his Persian Letters (1721), however, he had developed a more comprehensive theory of religious pluralism. The difference between the two perspectives—political and inter-religious—is even more notable in Jean-Jacques Rousseau’s writings. In his Social Contract (1762), he tries to overcome religious strife and intolerance by institutionalizing a “civic religion” that must be shared by all, while in his Emile (1762) he argues for the primacy of individual conscience as well as for the aim of a non-dogmatic “natural religion.”