This chapter shows how central it is, for Kant, that the concept of God only comes downstream from, and after, the possibility of belief in the ‘moral world’. This moral world is the realm of freedom, wherein autonomy is possible. Only if (deterministic) space and time do not go ‘all the way down’, are freedom, and autonomy, possible. If space and time are ‘things-in-themselves’, Kant asserts, ‘then freedom cannot be saved’ (A536/B564). Only if there is a dimension of reality beyond mechanism, is end-setting, and so autonomy, and the highest good possible. Not even God could achieve the highest good in a universe without end-setting, and without freedom, because this universe would be a sort of ‘desert’ with no ‘inner value’. The sequence of thought we find, both in the second Critique, and in other texts is this: first of all, Kant identifies a need for happiness in proportion to virtue; then Kant identifies the obstacle to the realization of such happiness, which is the mechanistic and deterministic structure of nature; and then Kant moves to the solution, which involves leaning into the realm of freedom, which realm includes God. The significance of the third phase in the progression of thought (the realm of freedom) has not been sufficiently considered, it is argued, when considering the Kant’s ‘moral proof’, and the relationship, for Kant, between morality, the highest good, and God.