Beginning in 509 BCE, Rome was governed as a

Caesarian democracy, associated with Julius Caesar, did not contribute to the decline of the Republic in a direct manner. Instead, it was an attempt to address issues of governance and power distribution within a crumbling system. While it did provoke opposition, it was the civil wars and territorial issues that were more significant in the Republic's decline.

The Gracchi reforms aimed to address socioeconomic inequalities and were a response to the Republic's issues, but they did not solely cause its decline. These reforms highlighted the existing problems but were part of a larger spectrum of conflicts and tensions that included territorial expansion and civil strife.

While the acquisition of territories such as Sicily, Sardinia, and Spain contributed to the Republic's wealth and power, it also exacerbated social divisions and conflicts over land and resources. However, this acquisition was part of the broader issue of rapid expansion that ultimately led to civil wars, making it a contributing factor rather than a singular cause.