A few years ago, Liliane Weissberg organized a conference that considered this question here at Penn. The project has developed further, and turned into a book. Weissberg’s new anthology, Psychoanalysis,Fatherhood, and the Modern Family, traces the development of Freud’s theory of the Oedipus complex and discusses his ideas in the context of recent psychoanalytic work, new sociological data, and theoretical explorations on gender and diversity. Contributors include representatives from many academic disciplines, as well as practicing psychoanalysts who reflect on their experience with patients. Their exciting essays break new ground in defining who a father is―and what a father may be.