Why the meaning of sin changed radically during the first centuries of Christianity Ancient Christians invoked sin to account for an astonishing range of things, from the death of God's son to the politics of the Roman Empire that worshipped him. In this book, award-winning historian of religion Paula Fredriksen tells the surprising story of early Christian concepts of sin, exploring the ways that sin came to shape ideas about God no less than about humanity. Long before Christianity, of course, cultures had articulated the idea that human wrongdoing violated relations with the divine. But Sin tells how, in the fevered atmosphere of the four centuries between Jesus and Augustine, singular new Christian ideas about sin emerged in rapid and vigorous variety, including the momentous shift from the belief that sin is something one does to something that one is born into. As the original defining circumstances of their movement quickly collapsed, early Christians were left to debate the causes, manifestations, and remedies of sin. This is a powerful and original account of the early history of an idea that has centrally shaped Christianity and left a deep impression on the secular world as well.

In Augustine and the Jews, Fredriksen draws us into the life, times, and thought of Augustine of Hippo (396–430). Focusing on the period of astounding creativity that led to his new understanding of Paul and to his great classic, The Confessions, she shows how Augustine’s struggle to read the Bible led him to a new theological vision, one that countered the anti-Judaism not only of his Manichaean opponents but also of his own church. The Christian Empire, Augustine held, was right to ban paganism and to coerce heretics. But the source of ancient Jewish scripture and current Jewish practice, he argued, was the very same as that of the New Testament and of the church—namely, God himself. Accordingly, he urged, Jews were to be left alone. Conceived as a vividly original way to defend Christian ideas about Jesus and about the Old Testament, Augustine’s theological innovation survived the collapse of the Western Roman Empire, and it ultimately served to protect Jewish lives against the brutality of medieval crusades. Augustine and the Jews sheds new light on the origins of Christian anti-Semitism and, through Augustine, opens a path toward better understanding between two of the world’s great religions.