No man is an island, not even Jesus, as John Meier writes in Companions and Competitors, the third installment of his four-part series, A Marginal Jew: Rethinking the Historical Jesus. The first volume, an overview of Jesus' background, chronology, and early years, was followed by a second that analyzed Jesus' most important messages and deeds. Here, Meier explains his conviction that "No human being is adequately understood if he...