Final answer:
Philosophers in Athens began questioning traditional beliefs and values after the Peloponnesian War due to the influence of the sophists and the decline in respect for traditions. they had experienced a decline in respect for traditions and laws, as well as exposure to different cultures and belief systems through trade, travel, and warfare.
Step-by-step explanation:
After the Peloponnesian War, philosophers in Athens began questioning traditional beliefs and values. One reason for this was the influence of the sophists, who were known for their learning and rhetoric skills. They taught rhetoric and persuasion to ambitious individuals, which led to concerns about the manipulation of public opinion. Additionally, the Greeks had experienced a decline in respect for traditions and laws, as well as exposure to different cultures and belief systems through trade, travel, and warfare.