Why did the death of an emperor usually lead to violence and civil wars

This passage describes the legal principle of if two laws conflict with each other, the court must decide on the operation of [t]he constitution .. must govern the case to which they both apply. this principle says it is the court's job to decide if actions are allowed by

What was one cause of the decembrist revolt? a. the desire for a constitutional monarchy b. the need for workers’ reforms c. the creation of a new railway line d. the outcome of the crimean war

Why did win shihuangdi force all nobles to live at the capital?