Regardless of what those hippie parents try to tell you, size matters and even babies know it. According to this intriguing study, psychologists found that infants less than one year old understand social dominance and how size factors into it:
"Traditional kings and chieftains sit on large, elevated thrones and wear elaborate crowns or robes that make them look bigger than they really are, and subordinates often bow or kneel to show respect to superior humans and gods," says Thomsen, a research fellow in Harvard's Department of Psychology and assistant professor of psychology at the University of Copenhagen. "Many animals, like birds and cats, will puff themselves up to look physically larger to an adversary, and prostrate themselves to demonstrate submission, like dogs do. Our work suggests that even with limited socialization, preverbal human infants may understand such displays."