Contemporary issues such as the COVID-19 pandemic and Big Tech offer opportunities to recapitulate and extend the book’s insights in this concluding chapter. More specifically, debates over public health and digital technology reveal the practical implications attending more theoretic inquiries about private actors’ status in constitutional politics. The weightiness of these issues thus supports increased urgency to study the position of private actors vis-à-vis the constitution and brings to the fore the particular value of the book’s republican framework in this enterprise. The republican framework may offer guidance regarding the contexts and goals to which horizontal application is suited, as well as the ways in which it may be further supported as a practical and a normative matter. By appreciating the ways in which horizontal application is republican, constitution-makers and courts might shore up this practice by taking steps to make it even more republican. This may come through renewed emphasis on the legislative function or contestation more generally in constitutional politics.

The rise of the European Union elicits both theoretical and practical questions about notions of citizenship, and citizens’ duties, that transcend nation-state boundaries. Indeed, its supranational nature invites reevaluation of the concepts of citizenship and political community more generally. In a similar vein, this chapter considers the European Court of Justice’s (ECJ) practice of horizontal application in light of republican theory. The fact that the ECJ has introduced horizontal application in EU law at all is itself a point of interest, given the debatable status of the Union as a political community in the republican sense. This book’s republican framework points toward a conceptual relationship between the development of horizontal application and the fate of the European Union as, in fact, something more than a loose union of nation-states. Put differently, a full flowering of horizontal application is theoretically tied to wider acceptance of the European Union as a fully fledged political community, complete with citizens’ duties to one another and a common good of which to speak.

Citing contemporary issues, this introduction situates horizontal application as one potential response to political-legal questions involving private actors. It makes the case for renewed scholarly attention to horizontal application as an increasingly common practice in constitutional politics. More specifically, examining horizontal application through the lens of republican political theory uncovers new significance in the discourses surrounding this constitutional practice. This theoretical perspective also elucidates how horizontal application is different from traditional constitutional understandings. After introducing the book’s republican framework, Chapter 1 explains the rationale underlying the choice of contexts examined in subsequent chapters. It concludes with an explanation of the stakes, as well as the potential benefits and drawbacks of horizontal application considered in the following chapters. Finally, it previews the concluding chapter’s argument that horizontal application may be further supported with certain political and institutional adjustments to make this practice even more republican.

The framers of the Indian Constitution laid explicit foundation for horizontal application, specifically in Articles 15, 17, 23, and 24. The constitutional debates reveal deep disagreements about the country’s future. At the same time, the textual provisions for horizontal application evince a clear vision on the part of key framers, such as B. R. Ambedkar and Jawaharlal Nehru, to combat entrenched systems of caste and discrimination. These and other framers aimed to instill a new fraternity across the polity, in part by holding private actors accountable for constitutional commitments. In the ensuing years, the Supreme Court vacillated between emphasizing the constitution’s conservative and transformative elements, often under the watchful eye of other governing institutions. For example, the Court largely yielded to Indira Gandhi’s excesses during the Emergency Era of the 1970s, and later to the Hindu-nationalist BJP’s agenda. Likewise, the Court’s development of horizontal application has been somewhat uneven, applying constitutional duties to private actors in a handful of cases. In those instances, involving such salient issues as labor, sexual assault, housing, and education, the constitutional discourses that emerge echo republican rationales from the founding era.

A core purpose of South Africa’s Constitution was to modify private orderings growing out of Apartheid’s legacy of racism. Hence, the South African framers, and specifically those representing the African National Congress (ANC), had strong reason to adopt some version of horizontal application. While republican elements occur in some of the ANC’s early thought on private actors’ duties, such discourses featured less when the party had to find consensus with representatives of the Nationalist Party while negotiating the Interim Constitution. A strong formalist streak in the legal culture, concerns about preserving property rights, and the incentives of institutions such as the Supreme Court of Appeal all cut against the practice of horizontal application. Ultimately, the constitutional framers provided for both direct and indirect horizontal application in the Final Constitution. The ANC’s vision was thus fixed in this feature, and subsequent cases further cemented a break from prior orderings. Republican discourses ensued in cases involving horizontal application and perhaps most clearly in issues striking at the heart of the old Apartheid regime, such as housing and education.

While the traditional vertical understanding of rights remains rooted in an older liberalism, the horizontal model possesses affinities with republican thought. This chapter makes these connections between constitutional practice and some of the core texts in the history of political thought. In addition to different understandings of the relationship between spheres, or the individual and community, liberal and republican thought generally conceive of liberty differently, a distinction that also maps onto the vertical and horizontal models in important ways. Rights in a horizontal understanding take on a new significance as more than mere rights, but ends as well, that potentially implicate the polity as a whole. Thus, horizontal application gives rise to new calls for parity between public and private spaces, which, in turn, amounts to a new source for understanding the duties of private actors. Such concepts as the common good and duty, integral to republican thought, come to the fore and offer a baseline for conceptualizing the parity and duties to which horizontal application gives rise. The chapter illustrates how these republican concepts occur in the context of actual cases and larger constitutional discourses, drawing examples from Germany, India, and South Africa.