The Household is not just a “castle” but a little commonwealth. When Cain was expelled from his father’s polity of hearth and home, he realized that exile from the community of kinfolks was a fate at least as bad as death. ”My punishment” he declared, “is greater than I can bear….I shall be a fugitive and a vagabond in the earth; and it shall come to pass that every one that findeth me shall slay me.” The family is primarily an expression of blood-ties and the affections they engender. In a broader sense, however, the household is a model for...