How did Seneca and Burrus become influential under Nero?

Seneca and Sextus Afranius Burrus rose to prominence as the primary advisers to Nero during the early years of his reign (54–62 CE). Their influence was established through several key factors:12

• Strategic Appointments: Julia Agrippina secured Burrus’s position as the sole prefect of the Praetorian Guard, ensuring the military's loyalty to Nero upon his succession. Meanwhile, Seneca served as Nero’s tutor, positioning him to guide the young emperor’s early policies.123
• Consolidation of Power: Following the death of Claudius in 54, the two men effectively became the rulers of the Roman world. They initially submitted to Agrippina’s influence but eventually worked to remove her from power.21
• Governance and Reform: They were responsible for formulating early imperial policies, including significant fiscal and judicial reforms and the promotion of more humane treatment for slaves. Their influence was further bolstered by placing their allies in key military commands on the frontiers.23

Ultimately, their power was precarious, as they were favorites of a tyrant; they were forced to condone or participate in the murder of Agrippina in 59, and their influence waned until Burrus's death in 62.123