Taking a somewhat new approach to the issue of interpersonality, the present book attempts to trace the evolutionary behaviors of Interactional Metadiscourse Resources (IMRs), persuasive rhetorical features of interaction in academic writing, in the recent two decades (1991-2010) to speculate that IMRs have undergone some interesting changes in the past twenty years.It is suggested that the growing professionalizaton of research community (Salagar- Meyer,2003a) may influence scientists argumetative cast for the increased promotional competitivness dominated in today academic worl