Whether the Eighth Amendment's Excessive Fines Clause applies to the States through the Fourteenth Amendment.
Holding
Yes. The Excessive Fines Clause is incorporated against the States through the Fourteenth Amendment's Due Process Clause.
Reasoning
A Bill of Rights guarantee applies to the States when it is fundamental to the American scheme of ordered liberty or deeply rooted in the Nation's history and tradition. Once incorporated, a right generally imposes the same substantive limits on state and federal governments.
The protection against excessive fines has deep roots in Anglo-American law. Magna Carta required monetary penalties to be proportionate to the offense and not so large that they deprived a person of livelihood. The English Bill of Rights later expressly prohibited excessive fines, and the American Eighth Amendment adopted substantially the same language.
The right was also broadly recognized in the United States at both relevant constitutional moments. Eight state constitutions prohibited excessive fines in 1787, and by the Fourteenth Amendment's ratification in 1868, 35 of 37 state constitutions did so. Every State today protects against excessive or disproportionate fines in some form.
The historical record also shows why the right is fundamental. Governments can use crushing financial penalties to punish political opponents, chill protected speech, raise revenue, or coerce disadvantaged people. After the Civil War, for example, Southern Black Codes imposed severe fines for vague offenses; inability to pay could result in compelled labor. These abuses confirmed the need for constitutional protection against excessive punitive economic sanctions.