For as by the disobedience of the one man who was originally moulded from virgin soil, the many were made sinners.
For as by one man's disobedience sin entered, and death obtained
How does it follow that from Adam’s disobedience someone else would become a sinner? For surely, if this were so, such a sinner would not deserve punishment, since his sins would not be his own fault. What then does the word sinners mean here? To me it seems to mean liable to punishment and condemned to death. Why was this done? Paul does not say, because it was not necessary to his argument…. But if you want to know what I think, I would say this: Far from being harmed or condemned, if we think straight, we shall see that we have benefited by becoming mortal, first because it is not an immortal body in which we sin, and second because we have countless reasons for living a religious life. For to be moderate, temperate, subdued and separated from wickedness is what death, by its presence and the fact that we expect it to come, persuades us to do. But following on these or even before these, mortality has brought many other blessings besides. For it has made possible the crown of martyr...
Notice that when Paul talks about sin and righteousness he uses the word many, for not everyone sinned before the coming of the law, nor has everyone who has received grace been justified—for “many are called, but few are chosen.” But when he talks about the death and resurrection of the body, he uses the word all. .