European law manifests powerful perfection-seeking internal dynamics, nudging—even compelling—legal actors to strive to make the European legal order ‘the best it can be’. This chapter uses a comparative approach to show that this perfectionism is contingent (that is, not necessarily shared by all legal orders), and that it is a highly distinctive characteristic of European legalism specifically. Uncovering the hidden dynamics of this juridical perfectionism is an important step towards rethinking European law’s agency and its correlate: our own ability to shape European integration through law.