I. GOD AND CAESAR VER TWO DECADES, up to the publication in 1951 of his Man and the State, Jacques Maritain sought to develop a new theory of the relation between Church and state. He was aware of previous Church magisterial teaching and canonical regulation that taught or assumed the model of soul-body union-the Leonine model as I shall term it, since it was formally endorsed in recent times by Leo XIII, though it had been proposed for a very long time in theology approved by the papacy and had been assumed by general councils and in ecclesial policy: The Almighty, therefore, has given the charge of the human race to two powers, the ecclesiastical and the civil, the one being set over divine, and the other over human, things.. .. There must, accordingly, exist between these two powers a certain orderly connection, which may be compared to the union of the soul and body in man. 1 Having recognized revealed religious truth, the state should also give it the protection of the laws: All who rule, therefore, would hold in honour the holy name of God, and one of their chief duties must be to favour religion, to protect it, to shield it under the credit and sanction of the laws, and neither to organize nor enact any measure that may compromise its safety. 3 And elsewhere 2 Ibid. 6. 3 Ibid. 6.