Probably only Christians, and among Christians mainly Mormons, have an adequate metaphysical explanation for 'free will' or agency.
To have a coherent metaphysics seems to me to entail a coherent and purposive universe - which seems to require a single creation - or else (if there were no creation, or many) everything would ultimately be 'random', incoherent, contingent and arbitrary; and agency would have no meaning.
And it also seems to require the participation of agents (e.g Men, in this instance) - that Men are actually engaged with the universe, and can change it by and from their own distinctive natures. This seems to entail that Men are 'gods' - in the sense that they are sufficiently separated from reality not merely to be caused-by it (i.e. determined) - and also that Men are able to change reality from themselves, expressive of their nature - and not merely arbitrarily. In other words, these are the characteristics of gods.
So, the need is for a single creation and also multiple gods inhabiting the creation. In other words (at least by my interpretation) Christianity as it seems to be depicted in the Bible - in which there is one primary creation; but several gods including explicitly the Father and the Son, implicitly the Holy Ghost, and the Sons of God who are presumably also gods (since they are sons).
(Whereas if there is just one God and no gods; then the beings in the universe cannot plausibly have free will, having all been made by the one in their entirety. Or, at least, the free will of Men - and angels - which is absolutely essential to Christianity, cannot be explained and must therefore be accepted as a pure mystery.)
This makes a simple and coherent metaphysical system explanatory of free-will/ agency, understandable at a normal common-sense level.
