A recent survey report announced in the United States stated that after selecting a large number of research subjects for comparative experiments, it was found that the number of outstanding people in celebrity families was 23 times the number of outstanding people in ordinary people's families. 
No family can prosper for three generations. No matter how outstanding the families are, the historical law of the cycle of prosperity and decline cannot be avoided.
 we can draw a highly reliable conclusion that a person's quality is mainly determined by heredity.