This fifteenth volume reviews the current status of many of the major themes that this series has explored. In each chapter, we challenged the authors to provide a succinct review of a particular area while maintaining the culture of this series by suggesting new directions and interesting questions to pursue. The authors, many of whom were thematic editors as young assistant professors, responded with explorations in the areas of Dynamics within Groups, Leadership, Micropolitics, Power, Ethics, Conflict, Political Correctness, Diversity, Group Learning, Technology, Engagement, Time Pressure, Culture, and Intergroup Processes - all reflecting the unique take on these topics within the context of groups and teams.