Along with the explosive growth in decentralization of organizations and in research that studies them, skepticism has emerged regarding the possibility that decentralization is a “mirage.” Specifically, the real-world effectiveness of decentralized forms of organizing has been both praised and challenged. In other words, is decentralization a revolution or a mirage? We address this question by first examining the “ideal” form of centralized organization—bureaucracy—introduced in the 1920s. We then identify key temporal pivot points that launched new trajectories of decentralization with increasingly distributed decision-making, disrupting the ideal. We identify four pivots (multidivisional, organic, community, and platform), discuss how each challenged bureaucracy’s core assumptions of an ideal form of organizing, and highlight both the advantages and the potential limitations of each. We conclude that recent decentralization trends represent neither a revolution nor a mirage. Rather, we uncover a resurgence of evolving decentralization concepts, developed across these four historical waves of disruption. We end our review with an integrative theoretical framework that offers a fresh perspective on decentralization. It suggests opportunities to develop and validate novel theoretical claims and directs scholarly efforts toward overlooked areas such as temporal dynamics, feedback loops, measurement, and the reversal of decentralization efforts.