From Roman informers to modern digital eyes, why do we watch each other?

How Does Surveillance Work? - Victoria Baines · 50:34 · Video: Gresham College · Watch at the source

In short: Surveillance is not merely a modern technological phenomenon; it is an ancient human strategy. By examining historical patterns of denunciation and intelligence gathering, we uncover the persistent motivations—ranging from fear and personal gain to political loyalty—that drive societies to monitor one another, revealing how surveillance shapes our collective security.

The evolution of surveillance is rooted in our transition from fearing wild animals to monitoring fellow humans to protect our livelihoods. As Victoria Baines notes, the desire to be forewarned has long driven the development of intelligence-gathering methods. While we often associate surveillance with modern digital tools, its mechanisms are deeply historical, reflecting a constant tension between the watchers and the watched.

In Ancient Rome, the absence of public prosecutors created a system where individuals could bring criminal charges against others. This practice, often framed as a public service by figures like Cicero, eventually devolved into the use of delatores—informers who profited from the property of the accused. During the reign of Augustus, this system expanded to include prosecutions for adultery and perceived threats to the Emperor’s majesty. By the time of Nero, who reigned from 54 to 68 CE, the definition of treason had become so broad that any word or action could be grounds for prosecution, effectively turning surveillance into a tool for regime loyalty and self-preservation.

The social impact of such systems is profound. Under Emperors like Domitian, who ruled from 81 to 96 CE, the environment became so fraught with informers that even trivial acts, like catching a large fish, could lead to accusations of treason. This atmosphere of universal watchfulness, later echoed in literature like Charles Dickens’ A Tale of Two Cities, highlights how surveillance can be weaponized. Whether through the encoded knitting of Madame Defarge or the professional denouncers of the Roman Imperial period, the core dynamic remains: when there is an incentive—be it money, safety, or political standing—surveillance inevitably shifts from passive observation to proactive intelligence gathering.

Understanding these historical precedents is essential for navigating today’s surveillance landscape. By recognizing that the impulse to monitor is driven by human motivations rather than just technological capability, we can better evaluate the impact of contemporary alert systems on our privacy and security.

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