Anyone who's ever been with a baby can tell you：if they're upset about something, they will let you know.Scientists have been aware of this behavior, but what they did not know, until now, is that if babies see someone else being treated unfairly, they expect the leader in that situation to step in and do something about it.Renee Baillargeon is a psychologist at the University of Illinois.Baillargeon says it seems babies are born with these expectations of what a leader is and how they should behave.Alan Fiske studies human relationships at the University of California, Los Angeles.He says many people underestimate what babies are capable of understanding and figuring out about the world, since they're just barely learning how to walk and talk.It shows that they expect a leader to not just use power for his or her own self-interest but to use their authority to regulate the morality of their followers.

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