This paper provides a metaphysical framework which enables the possibility of the hypostatic union. More specifically, social ontology will be used to philosophically ground the distinction between nature or substance on the one hand, and person on the other hand, which is crucial to that debate. There are some historical precedents for a juridical approach in christological debates, but the main sections develop a systematic metaphysical account. Relying on a generic version of dispositional realism, and the distinction between the ability (...) space and the liberty space of a person, a person is the locus or nexus of contingent activations of alternative possibilities. This is distinct from the set or range of alternative possibilities open to a person. Persons can therefore function as artificial persons, paradigmatically exemplified in sovereign states. Extending that framework to the supernatural level enables the possibility of a divine person uniting a divine and a human nature. (shrink)