  But God will, in practice, not exercise absolute power: as Aquinas puts it, “what is attributed to the divine power insofar as the command of a just will executes it, God is said to be able to do with respect to His ordered power”. (Aquinas, Summa theologiae I, qu. 25, a. 5, ad 1) So there are limits to God’s ordained power (which come from the concept of a just agent): inside the space of worlds which God could create by absolute power, there is a space of worlds which could be created by ordered power. It is this smaller space of worlds which is relevant for our question of the necessity of causal connections. And, with respect to God’s ordered power, there was a wide range of causal assertions which were regarded as necessary by medieval thinkers.