Children Distinguish Right and Wrong from a Young Age
Children are able to distinguish between right and wrong from a very young age, according to a study done by New York University.
In a study of 200 children from Children's Museum of Manhattan it was found that by the age of 3 they were capable of distinguishing good from the bad and punish bad behavior even at a personal cost. It was found that children may be exhibiting 'in-group policing' or may be looking at from sustaining their reputation among the group.
The researchers are not sure whether the behaviour is innate in an individual or acquired in the first few years after birth. However, there it is quite human to encourage good behaviour and do go themselves.