Final answer:
The central ideas of this excerpt are Caesar's accumulation of power and appointment as dictator for life, and the formation of the Second Triumvirate by Mark Antony and Octavian.
Step-by-step explanation:
The central ideas of this excerpt are:
- Caesar's accumulation of power and appointment as dictator for life unnerved many Romans who distrusted autocratic rulers.
- Mark Antony and Octavian formed the Second Triumvirate and seized control in Rome, but their alliance was not destined to last.