What Was the Cold War about, and what countries were involved?

B

Explanation:

Hereditary rule

For most of this period, emperors were not chosen on the basis of their ability or honesty, but simply because they were born in the right family. For every great leader, such as Augustus, there was a tyrant like Caligula. For every Claudius there was a Nero; for every Vespasian, a Domitian.