Serious questions have been raised regarding the necessity to continue focusing our research on what constitutes individual, or what the authors refer to as singular leadership. Although the authors consider these questions to be important to advancing the field of leadership theory, research, and practice, they also suggest that attempts to minimize the relevance of singular leadership may hinder progress in other domains of leadership research. In this chapter, the authors explore how and why singular leaders and their leadership matter, and how they may influence follower, peer, and organizational outcomes. The authors use a paradoxical framework to present a theoretical model and propositions that allow us to clarify the influence of different forms of singular leadership within organizations. In our examination of singular leadership, the authors consider both positive and harmful modes of attributes, cognitions, and behaviors.