Final answer:
Cicero's survival during a time of political violence and upheaval can be attributed to his political skills, possible popular support, and some good fortune.
Step-by-step explanation:
In reflecting on the risks and the political turmoil of his times, Cicero acknowledges that he hasn't been killed yet despite the dangers he faced as a prominent public figure in a period of aggressive political rivalries and social unrest. The excerpts provided do not explicitly state why Cicero hasn't been killed, but they do illustrate the violent and chaotic environment of Rome during his life. The political machinations and the potential for sudden violence were a constant threat to Cicero, and his survival can be attributed to a combination of his political acumen, perhaps some level of popular support or protection, and a measure of fortune amidst the power struggles of the late Roman Republic.