Abstract: The Assembly Clause is the ugly duckling of the First Amendment. Brooding in the shadow of the heralded Free Speech Clause and the venerated Religion Clauses, the Assembly Clause has been described even by its advocates as “forgotten,” a “historical footnote in American political theory and law.” The clause protects “the right of the people peaceably to assemble”—a phrase the Supreme Court has interpreted only once over the past fifty years despite issuing hundreds of opinions interpreting its First Amendment siblings. From the moment it was included in the proposed federal bill of rights, observers have questioned who would bother turning to the Assembly Clause for assistance given the First Amendment’s other protections of free expression. This paper offers a surprising answer. After describing the historical context in which the “right to assemble” was first expressed, it argues that the right could be interpreted not as a narrow right of self-expression but rather as a broad right of self-government. In the decade preceding the American Revolution, advocates of “the right to assemble” used the phrase in response to attempts by royal and parliamentary officials to subordinate their town meetings and colonial legislatures—or, in the language of the day, to subordinate their local and general “assemblies.” This subordination came in various forms: Parliament passed laws disempowering New York’s general assembly until it enacted certain legislation; Parliament censured and then banned town meetings in Massachusetts from debating international affairs; and governors up and down the continent dissolved, changed the location of, and otherwise coerced general and local assemblies into repealing legislation they regarded as seditious. In response, town officials and colonial representatives complained that all people have an inherent right to participate in assembled governments, which in turn have the power to consult their constituents and seek a redress of their grievances—whether by enacting laws with their constituents’ consent or by petitioning other governments for their assistance. The historical context of the assembly clause’s origins suggest that the clause has been interpreted far too narrowly. Once the clause is understood as protecting not only the informal expressions of conventions, marches, and gatherings but also a right to meaningfully participate in effective government, the state and federal assembly clauses look like an important, “forgotten” limit on disenfranchisement and local disempowerment.