For the most part, the enterprise of research requires discoveries that deepen rather than broaden knowledge in a discipline. For every essay that newly notices connections from one area of study to another, there are probably hundreds of papers that concentrate more attention, more narrowly, on an issue within one specialization. A key task of doctoral education is to teach people to do this, to specialize and to deepen our collective understandings. Given the finite limits of doctoral education (particularly time, staff, and money), such specialization implies a trade-off with general knowledge. This is not a new problem. It probably dates to whenever the second course in anything was first taught, whenever that was.Nonetheless I think it is periodically useful to ask how we are doing. An education in 2010 cannot contain an education from 1985 along with everything extra from the last quarter century. As we omit things from our curricula are we abandoning things that are still important? Are young scholars whose knowledge base lacks the breadth of a 1985 curriculum properly sited to make new discoveries in relatively unexplored areas? Are they only equipped to keep digging in whatever hole they chose at the age of 25? And all of this implies another question that seems quite important to those of us who have spent most of our adulthoods living in academic departments: Are young PhDs able to participate in communication faculties that have a common mission, a sense of collective coherence? I invited three scholars to address these sorts of matters. Each of them is well positioned*by experience, character, scholarship, and perceptiveness*to consider these questions. I did not have any reason to expect the concord that readers will find in these essays. I did have good grounds for expecting that the essays would be well grounded and I have not been disappointed. I asked them to consider, each within his or her own specialization, What should a new PhD know?Dale Hample PhD, University of Illinois is an associate professor of communication at the University of Maryland. Correspondence to: Dale Hample,The study of interpersonal communication has a long and honored tradition and it remains a critical area of study offered by our best doctoral programs. Certainly this is true of the doctoral program in Communication Studies at Northwestern where we have been offering graduate study in interpersonal communication for almost four decades. The graduates of such programs are entering into a community of productive and insightful scholars whose research continues to make important contributions. One need only examine the current volume of the Handbook of Interpersonal Communication (Knapp & Daly, 2002) to see the wide range of topics being researched, the sophistication of the theory and methods being used, and the valuable contributions arising from our inquiry. Moreover, several recent collections provide clear evidence of the contribution of interpersonal communication research to the well-being of individuals and relati...