Roman imperial succession shifted from dynastic inheritance to explicit selection

Evidence

His adoption of Piso – on the premise that ‘the principle of choice will stand in the place of liberty’8 – represented a decisive break from the old hereditary system. — Stephen Kershaw, A Brief History of the Roman Empire, 657

Categorization

• corroborated: 2 independent passages support this claim — Stephen Kershaw, A Brief History of the Roman Empire, 657