The Mechanics of the Open Letter: Why Collective Epistolary Action Remains a Primary Tool for Expert Dissent

In July 2026, a coalition of more than 200 economists and technologists published a document titled "We Must Act Now." The text was fewer than 100 words long, yet it represented a calculated pivot in the governance of artificial intelligence. Addressed nominally to policymakers, the document demanded immediate, actionable economic guardrails to manage the workplace transformation driven by frontier AI models.[3]

But make no mistake: the policymakers were never the intended audience. The true target was the broader business community and the global media apparatus. This dynamic exposes the core reality of the modern open letter. It is not a genuine attempt at private persuasion; it is a piece of epistolary activism that leverages the intimate framework of a letter to execute a highly public power play.[1]

To understand why experts continue to rely on this format, we must look at how it bypasses traditional gatekeepers. Historically, the open letter served as a vital tool for marginalized voices. From Émile Zola's famous "J'Accuse...!" in 1898 to Martin Luther King Jr.'s 1963 "Letter from Birmingham Jail," the format has long been used to drag ignored political debates into the harsh light of public scrutiny.[1]

Today, that legacy has been systematized into a formal mechanism of institutional change. Academic journals and policy platforms now actively solicit "Open Letters" as a distinct article format specifically designed to initiate policy shifts. These modern iterations are encouraged to be short, devoid of technical jargon, and accessible to a broad audience, allowing groups of experts to present bold calls to action directly to the public.[7]

The effectiveness of this format relies heavily on a concept known as "authorization legitimation." Rather than relying solely on the strength of a solitary argument, modern open letters draw their power from the collective weight of their signatories. By assembling a critical mass of Nobel laureates, industry leaders, or peer-reviewed researchers, the authors establish an unassailable moral or scientific consensus that demands a response.[2]

In the realm of international law and diplomacy, this mechanism serves three distinct purposes: advocacy, solidarity, and public education. Legal scholars and human rights advocates frequently deploy open letters during times of geopolitical crisis to protest government actions and demand specific remedies under international law.[4]

Yet, a structural analysis of these diplomatic letters reveals a fascinating paradox: many of them are addressed to no one in particular, or to entities that are highly unlikely to read or respond to them. The advocacy contained within these letters is consistently expressed in formalist legal language, demanding identified courses of action, even when the nominal addressee is effectively a prop.[4]

This paradox is resolved by understanding the concept of the "third-party reader." The defining feature of an open letter is that it is written not just for its recipient, but for a wider, observing audience. By framing a demand as a letter, the authors create a voyeuristic dynamic that invites the public to witness a confrontation.[1]

The true target of the open letter is therefore the public consciousness. The authors do not expect to persuade the nominal addressee through the logic of their arguments; rather, they aim to generate sufficient reputational risk and public pressure to force the addressee's hand. The letter changes the political or corporate environment in which the target operates, making inaction costlier than compliance.[4]

This mechanism is increasingly visible in the technology sector, where the focus of open letters has shifted dramatically. Early missives regarding artificial intelligence focused heavily on abstract ethical warnings and existential risks, sparking conversation but providing limited guidance toward concrete action.[3]

The most recent wave of AI letters, however, has pivoted toward actionable economic demands. By calling for the construction of specific incentives, guardrails, and institutions, these letters push for tangible business action. This shift reflects a maturation of the genre, moving from raising awareness to demanding measurable institutional changes regarding workplace displacement and technology deployment.[3]

The open letter format has even been co-opted by state actors as a tool for administrative compliance. During the COVID-19 pandemic, local governments in China utilized open letters as an administrative requirement to mobilize residents. These official letters reconstructed the identity of citizens into active protagonists in a collective struggle, using the intimate tone of a letter to soften the imposition of strict public health mandates.[5]

The strongest counter-argument to the utility of open letters is their abysmal success rate. Despite their widespread adoption, the actual effectiveness of the open letter remains highly contested among scholars and communication experts. Critics rightly point out that the format is frequently misused, resulting in a culture of complaining or organizational reputation management rather than genuine social change.[1]

Furthermore, the vast majority of open letters fail to generate significant news coverage or public awareness. Many lack concrete policy proposals or the empirical data necessary to back up their claims, rendering them easily dismissible by their targets. The letters that do succeed are often those that manage to align cognitive arguments with affective, emotional resonance.[2]

Ultimately, the open letter functions as a mechanism of mobilization rather than pure persuasion. It is a strategic performance of dissent, designed to legitimize a viewpoint, rally a community, and alter the public narrative. As long as public reputation remains a vital currency of institutional power, collective epistolary action will continue to serve as a primary tool for expert advocacy.[6]