By Pope Benedict XVI, The Catholic Thing - Matthew’s genealogy traces the male line, but in the course of it, prior to Mary who appears at the end, four women are mentioned by name: Tamar, Rahab, Ruth, and the wife of Uriah. Why do these women appear in the genealogy? By what criterion are they chosen?... It has been said that all four women were sinners. So, their inclusion here would serve to indicate that Jesus took upon himself their sins-and with them the sins of the world – and that his mission was the justification of sinners.