In Civilization and Its Discontents, Freud made abundantly clear what he thought about the biblical injunction, first articulated in Leviticus 19:18 and then elaborated in Christian teachings, to love one's neighbor as oneself. "Let us adopt a naive attitude towards it," he proposed, "as though we were hearing it for the first time; we shall be unable then to suppress a feeling of surprise and bewilderment." After the horrors of World War II,...