Why is it difficult for the poor to turn over: they mature late. Most of the poor have to wait until they are in their 30s or 40s to understand the logic of society and human nature. It's like you tossed and turned for half the night, and just as you touched the pillow, it was dawn. Without constructive guidance, a poor and honest family of several generations will face the biggest resistance before the age of 30 from family members. They don't have enough cognitive level and connections to give guidance and help, and may even make things worse. Many rebellious children from poor families are more likely to succeed because they get rid of the shackles of their original families early. There is no trial and error cost. Children from rich families can try and make mistakes and continue to grow. Children from ordinary families will fall to the bottom after trying and making mistakes once, and it is difficult for them to turn over.