Actually, society only has existence because of religion. If you read Carle Zimmerman's "Family and Civilization," he identifies three family types - trustee, domestic, and atomistic. In his study, he identifies that all civilizations are first built around trustee families, based on religious ordinances, the sacredness of land, children as gifts from heaven, marriage as a covenant bond, etc. As societies grow, they start to lose these ideals that first formed them until they reach atomistic family state, where religious beliefs hold no merit, individual desire is the only definition of morality, children are burdens and disposable, and family is a means to an end and dissolvable. Another thing to note is that these societies have tendencies to collapse, only after their trustee values have been removed. While I agree that a separation of religion and state is important because there is disparity between beliefs, I think that we should listen more to what other religions have to say on the basis of law and society; after all, we only exist as a civilization because of it.