The human brain undergoes substantial development throughout our lives, particularly from birth through adolescence. Indeed, it must undergo more development after birth than does the brain of nearly any other species. Our brains are shaped substantially by the context in which they develop. They need all kinds of stimulation and social support to develop optimally. We are very social creatures. For example, we see social relationships even in inanimate objects; babies can demonstrate a preference for characters who are nice as compared to ones who are mean; and we act like the people around us.