Assembly rights must be broadly shielded
The First Amendment's guarantee of peaceful assembly is not a courtesy the government extends to popular causes; it is a structural necessity in a republic built on the premise that the people must be able to organize, petition, and press their grievances against those who hold power. If the law permits a civil judgment against an organizer for the independent violent act of an unidentified third party whom the organizer neither directed nor encouraged, then the practical consequence is to make mass political assembly prohibitively dangerous for any organizer who cannot guarantee the conduct of every stranger who shows up. That is not a marginal chilling effect — it is a mechanism of suppression dressed in the neutral language of tort. The extended-republic theory I argued in Federalist No. 10 depends entirely on factions retaining the capacity to mobilize and compete; strip away that capacity through liability exposure, and you do not achieve order — you achieve the silencing of dissent, which is the far greater danger to free government.
Law must remedy foreseeable third-party harm
The question before the Court is whether tort law may reach an organizer whose conduct foreseeably created the conditions for injury, even when the immediate actor was an unidentified third party. I would argue it may, with care. The common law has long recognized that one who assembles a crowd in circumstances where violence is a foreseeable — not merely theoretical — consequence bears some duty of reasonable care toward those foreseeably in harm's way. This is not a novel principle; it is the ordinary construction of negligence. The First Amendment rightly shields the content of political speech and the act of assembly itself; it does not, and should not, serve as a blanket immunity from general laws of civil responsibility. The threshold must be set high — foreseeability must be specific, not speculative — so that ordinary organizers of peaceful protest are not chilled. But where the conditions were palpably dangerous, and an organizer pressed forward regardless, the law's remedy ought to remain available.
Popular dissent warrants near-absolute protection
The right of the people to assemble and to petition their government for redress of grievances is not a conditional right, extended only so long as every participant in a crowd conducts himself without fault. To hold an organizer civilly liable for the independent criminal act of an unidentified third party — someone the organizer neither directed nor could control — is to make the act of organizing itself the offense, which is precisely the chilling the First Amendment was designed to prevent. History is plain on this: every unpopular movement, from the abolitionists to the suffragists, was attended by disorder it did not invite. If the law transforms that disorder into a weapon against the organizer, then the republic has handed its magistrates a tool to silence dissent by the mechanism of financial ruin rather than the cruder one of the jail. Injured parties deserve remedy; let that remedy run against the hand that threw the stone, not the voice that called the people together.