In Philosophical Essays concerning Human Families, Stanley Vodraska describes a principle of moral practice that he calls "the principle of familial preference." In ordinary circumstances, a moral agent should persistently provide preferential treatment to members of his or her family and should not pursue the good of extra-familial persons to such an extent as to disadvantage or neglect his or her family. The essays uncover this principle in human practices of love or charity, mercy, justice, and prudence, and measure its weight in religion, moral philosophy, and the political order.