When Edward Gibbon embarked on his great history of the decline and fall of the Roman Empire, he began his narrative with the accession of Commodus. Marcus Aurelius, the father of the new emperor, was a man who, in the noblest traditions of the Roman people, had combined the attributes of a warrior, a statesman, and a philosopher; Commodus was none of these.
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Septimius Severus was born on 11 April 145 or 146 CE in Leptis Magna (present Libya) as Lucius Septimius Severus (Lucius Septimius Severus). It ruled from the year 193 to 211 CE. He won the civil war that broke out after the death of Commodus and stabilized the situation in the state. He started a new Severan dynasty.
https://www.imperiumromanum.edu.pl/en/biographies-of-romans/septimius-severus/
Acerbity [əˈsɜːbɪtɪ] 