The preliminary part of this paper demonstrates how defective models of personal identity have dominated social theory since the Enlightenment, and indicates their deficiencies for social theorizing and as a basis for the Catholic Church's social teaching. Part two examines the consequences of conceptions that are incompatible with the four pillars of Catholic social teaching: human dignity, solidarity, subsidiarity and the common good. Part three examines why recent social teaching is anti-individualist in its emphasis on the connection between personal identity and social relations and endorses relational emergent properties and powers, which are grounded in social realism. These points are held to specify necessary but far from sufficient social conditions required for transforming late modernity into a 'civilization of love'. The preliminary part of this paper demonstrates how defective models of personal identity have dominated social theory since the Enlightenment, and indicates their deficiencies for social theorizing and as a basis for the Catholic Church's social teaching. Part two examines the consequences of conceptions that are incompatible with the four pillars of Catholic social teaching: human dignity, solidarity, subsidiarity and the common good. Part three examines why recent social teaching is anti-individualist in its emphasis on the connection between personal identity and social relations and endorses relational emergent properties and powers, which are grounded in social realism. These points are held to specify necessary but far from sufficient social conditions required for transforming late modernity into a 'civilization of love'.