The Roman Empire never solved its succession problem. This was not an oversight or a failure of political imagination — it was a structural consequence of the way the principate was constructed. Augustus had built a system that was functionally monarchical but constitutionally republican, which meant it could not have formal hereditary succession without admitting it was a monarchy. The result was a fiction maintained for centuries: that each emperor received his powers from the Senate and people of Rome, and that the previous emperor’s designation of a successor was a recommendation rather than a binding determination. Everyone knew this was a fiction. The fiction was maintained because the alternative — acknowledging that Rome was a hereditary monarchy — was politically untenable for an aristocratic culture that had executed men for aspiring to kingship.