How can we regulate private power in a globalized, digitized world where state-centered sovereignty, territorial boundaries, and traditional legal frameworks fall short? This introductory chapter provides an overview of the book, its arguments, methodology, and contributions, addressing the urgent need for accountability mechanisms to tame the increasingly unilateral global governance by a handful of corporations. Focusing on content moderation, it examines two key case studies: the EU’s Digital Services Act (DSA) and Meta’s Oversight Board. Both exemplify “emulation,” where public law mechanisms, particularly constitutional and administrative, are adapted to private governance.

Analyzing these “Emulated Guardians”–institutions borrowing the legitimacy of courts while operating in private or hybrid contexts–this book highlights their reliance on performativity and public perception to assert authority. Through interdisciplinary analysis, empirical findings, and expert interviews, the book reveals the ambivalent outcomes of emulation: promising tools for accountability yet sometimes lacking practical efficacy. Ultimately, this work frames these mechanisms as harbingers of new accountability norms, arguing that governance in the digital age demands not only novel institutions but also robust public engagement. It situates these developments within broader debates about power, legitimacy, and the evolving role of public law ideals in globalized, networked environments.