Hey:)
I think the reason would be <span>Declining birthrates.
hope that's helpful</span>
Answer:
After initial Persian victories, the Persians were eventually defeated, both at sea and on land. The wars with the Persians had a great effect on ancient Greeks. The Athenian Acropolis was destroyed by the Persians, but the Athenian response was to build the beautiful buildings whose ruins we can still see today.
Confucius
Key texts from Confucius (551-471 BCE) were core material for the civil service examinations in imperial China, beginning in the Sui dynasty (581-618 CE) and reaching the height of development in the Qing dynasty (1644-1912 CE). Not only was the focus on Confucius, but on recognized authoritative commentaries on Confucius.
