The document summarizes that the difference between poor and rich countries is not due to age, natural resources, or intellectual ability. Rather, the key difference is the attitudes and principles that are commonly followed by citizens. People in rich countries generally adhere to principles like ethics, integrity, responsibility, respect for laws, work ethic, savings, punctuality. In poor countries, only a minority exhibit these functional behaviors that are characteristic of developed societies. For a country to develop, its people must be willing to adopt these principles through education and cultural change.