This chapter looks at the ways in which the police is defined and confined by internal standards of constitutional acceptability. Before we get to the matter of individual rights, we must ask the question of whether and to what extent the police power is being used in ways that are reasonable, not arbitrary, and not the product of animus or unacceptable influence. These internal structural considerations have been used to limit the scope of the power and, more to the point of this chapter, they have the potential of being used in a way that reconciles broad governmental power with the protection of citizen interests and liberty.

This chapter begins a new part, this focusing on structural considerations in the scope and exercise of the police power. Some of the critical issues involving the power involve who gets to exercise it, and upon what conditions. The separation of powers among departments of government is relevant here, and there have been concerns in courts when the state legislatures delegate the exercise of this power to governors and administrators. We discuss some of these controversies in this chapter. Moreover, we discuss the ways in which the police power has long been used by local governments to implement health, safety, and welfare objectives in their community. The relationship between state and local governments, often labelled “localism,” in order to capture the constitutional dimensions of this dynamic relationship, is a focal point of this chapter.

This chapter looks at how the police power has evolved in judicial interpretations and legislative enactments to the present day. It begins by exploring how the shifting approaches to regulatory governance more generally and also various state constitutional developments in the past two centuries affected thinking about the overall structure and purpose of state regulatory authority. It then turns to a number of critical areas in which the police power was used as a tool of protecting health, safety, welfare, and the common good. It begins with morals, a linchpin of traditional police power regulation, and then proceeds to discuss urban blight, occupational licensing, and public health emergencies

This chapter examines the origins of the police power in the American constitutional system. In the beginning, the framers of the early state constitutions were engaged in two struggles: how to create effective frameworks of government, and how to define the relationship between national and state government. The police power was one the key reserved powers the states possessed viz. the Tenth Amendment. This chapter illuminates how the state police power emerged and developed in the nineteenth century and, in particular, how it evolved from a notion of sic utere (righting specific wrongs) to salus populi (promoting the public good). It ends at the end of Reconstruction, with key cases illuminating the scope of state regulatory discretion under the police power.

Beginning after the end of Reconstruction, this chapter looks at the ways in which the police power emerged to facilitate an increasingly bold project of regulation. Key Supreme Court decisions supported the use of the police power to undertake and implement the objectives of a growing economy and a widening sphere of government. State power accompanied expanding national power and all levels of government tackled myriad persistent and new problems. In a case from the early twentieth century, for example, the Court upheld a vaccine requirement as a reasonable exercise of the public health authority of the state. Regulatory power was called into question by the Supreme Court’s Lochner-era decisions, but even this two-decades-long movement did not seriously threaten the ability of state governments to carry out ambitious regulatory agendas. Significantly, the Court put its imprimatur on the government’s zoning power in key cases from the late 1920s. And though the Court would message to the states that there were limits on how far they could go in restricting property rights, through doctrines such as “regulatory takings,” what emerged by the end of World War II was a robust conception of the state police power, one that gave government a wide sphere of action and authority to protect the general welfare.

This chapter touches upon the very large topic of how individual rights interact with the police power. In what sense and to what degree do rights contravene state and local exercises of the police power? It is a shibboleth that regulatory power is constrained by rights. But this chapter interrogates these issues in more depth and detail, by discussing how rights claims are framed in connection with the police power and how the government’s assertions of power are circumscribed by particular doctrines and arguments in courts. Further, the chapter considers how the debate over the nature and content of so-called positive rights implicates the police power questions, questions concerning authority and content.