Why is a family generally better than a second child?

Follow-up: My family has been a farmer since I can remember, and my grandfather is not as good as his brother. Although my father is the best of the four brothers, he is still in the countryside for various reasons, and my second uncle is better. In my generation, I only took the exam twice. Second, my brother went to Huake. And my classmates, I found that in general, the second grade is better than the boss and has a better future. Answer: hey! I wonder where you found it! A little one-sided! But some scientists have studied it! If it's twins, the second one is smarter than the boss! Follow-up: There are many such examples around. I know this is just what happened around me, and maybe it doesn't mean anything. But I want to think about the most fundamental possible reason. Answer: You think too much! Destiny is in your own hands! You have to choose your own path and go by yourself! Others can only be used for reference! Do not represent yourself! Follow-up: it is certain to rely on yourself. What is it that blames everything on external factors? But have you ever wondered why a boss is different from a penis? There must be some reason. Answer: pour! There is no difference between people, so how to distinguish? Nature and nurture! You're already inside! Extreme! Congenital factors depend on genes, and acquired factors depend on parents, society, the public, schools, themselves and so on! Since you agree to be alone, that's right! Then we shouldn't discuss it any more! Follow-up: Hehe, entertainment? . . Answer: speechless!