Rubicon shows how organized violence and elaborate spectacle, often calculated to win favor with the crowd, became central to political life during the Republic’s last decades. As old norms weakened, ambitious men relied on intimidation and grand displays to unsettle rivals and claim authority. Holland describes a world in which leaders fought for power through street battles, judicial killings, and acts of showmanship that turned politics into a mix of performance and fear and ultimately spilled over into civil war and dictatorship.

As with Rome’s other “paradoxes,” a tendency toward showmanship existed from the start, often intersecting with populism. Holland introduces the Gracchi as the archetypal populares, or politicians who curried favor with the crowd, though he also distinguishes them in their earnestness: “[T]hey had been concerned with their own glory—they were Roman, after all, but they had also been genuinely passionate in their desire to improve the lots of their fellow citizens” (29). The problem, as Holland goes on to explain, was that the system was so suspicious of attempts to exercise power in this way that it allowed the problems the Gracchi identified to fester.

The next time those problems surfaced, the results were therefore more explosive. The showdown between Marius and Sulla similarly pitted a populist politician against a representative of the old guard but quickly escalated beyond even the mass executions of the Gracchi’s followers. When Sulla seized Rome, he created the proscriptions, which allowed state-directed murder, and he staged his own brutality by killing thousands of Samnite prisoners near the Temple of Bellona. While addressing the Senate, he dismissed the Samnites’ cries outside as “some criminals receiving their punishment” (94). This moment fused official business with mass killing and showed that a challenge to a powerful man could be met with extermination. Marius’s sojourn in power was no better, as it, too, entailed a “brutal purge of his enemies” (85).

Within a generation, that pattern filtered into daily life. Clodius, in particular, was innovative in yoking populist appeal to violence via his organization of gangs that fought in the streets, disrupted the courts, and burned the Senate House. A political opponent, Milo, responded by organizing gangs comprised of gladiators and others skilled in combat, further normalizing violence as a tool for political gain. These displays of violence coincided with other forms of spectacle that shaped public authority. As aedile, for instance, Caesar oversaw unprecedented, ostentatious public games: “For the first time, gladiators were adorned in silver armor. Glittering magnificently, more than three hundred pairs of them fought it out for the entertainment of the citizenry” (192). These shows let men like Caesar appeal directly to the people; their authority drew strength from personal generosity and fame as much as from official office. In this, Holland implies, they extended but also perverted the populares tradition, offering little of substance to a population that had only grown more desperate while weaponizing that desperation for political ends. Ultimately, Holland suggests that such tactics reshaped the political imagination as displays of force and personality prepared Romans to accept a single dominant ruler.