Abstract

The Doctrine of Original Sin seems to require that human nature has literally undergone a change from its prelapsarian to its postlapsarian condition.It is not clear that this claim makes sense. How can human nature, the feature(s) in virtue of which human beings are what they are, change in time? (Think of the parallel claim about √2.) I consider three medieval attempts to resolve this problem: (1) Augustine’s two theories about shared human nature; (2) Anselm’s proposal that original sin is an individual deficiency; (3) the “biological” proposal suggested by Odo of Cambrai and developed by Pseudo-Joscelin.