our environment plays as big—if not bigger—a role as heredity in shaping personality and intelligence. What it is saying is that whatever that environmental influence is, it doesn’t have a lot to do with parents. It’s something else, and what Judith Harris argues is that that something else is the influence of peers. Why, Harris asks, do the children of recent immigrants almost never retain the accent of their parents? How is it the children of deaf parents manage to learn how to speak as well and as quickly as children whose parents speak to them from the day they were born?
