Take ancient Egypt as an example. At that time, ancient Egypt was in the Ptolemaic dynasty. Now, under the rule of the Greeks, Egyptian culture and Greek culture exchange and merge with each other. But by Ptolemy IV, he and Qin Ershi were tyrants, but he was more cruel than Qin Ershi. He killed his mother and brother, played with the members of the royal family in applause, was greedy for pleasure and didn't care about people's lives, so the Zhou Dynasty began to decline. At this time, ancient India was in the peacock dynasty. We all know that India is a slave dynasty, and the Qin Dynasty has changed from slavery to feudalism. Under the leadership of the third generation of Ashoka, ancient India was in its heyday, while China was in a period of division. By 22 1 year BC, the peacock dynasty in ancient India also began to decline. Every region will have its own culture, system, economy and dynasty change. Qin Shihuang unified the six countries and made the people live a stable life, but when it arrived in Qin Ershi, the people lived in dire straits. Then there was a war, which didn't end until the establishment of the Han Dynasty. The biggest victims of war are the people, but some wars have to be waged. It is an unchangeable truth that the world will be United and divided for a long time.