Anselm on Free Will and the (Possibly Fortunate) Fall

Anselm of Canterbury is the first Christian philosopher to offer a systematic, libertarian analysis of human freedom, including open options and self-causation. Freedom is valuable for the creature since it enables him to share in the aseity of God. There is a text in Cur Deus Homo which would seem to undermine this claim. Here Anselm says that, had Adam and Eve never sinned, their progeny would have been "confirmed in justice" so that they could never sin. But this seems to deny real freedom to the children of unfallen parents. I offer possible ways to deal with this text.