Extraction code: 28na

Qian Er's father told his children the history of the world, from the era of slash-and-burn ignorance to today's rapid development of civilization, from tribal fighting with gravel sticks to the invisible war between the United States and Iraq. Read the picture of world history in children's language and look at the long river of world history from children's perspective. What is shared below is the world history that Qian Dad told his children. ?