Assertion: empire's reign | /r/DistinctFrom | hereditary succession
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Source sentences:
text: The reign of Nerva (96-98), who was selected by the Senate to succeed Domitian, began another golden age in Roman history, during which four emperors–Trajan, Hadrian, Antoninus Pius, and Marcus Aurelius–took the throne peacefully, succeeding one another by adoption, as opposed to hereditary succession.