I believe that there is a direct link between a child's attachment style and his well-being later in life. In my opinion, the attachment relationship that a child forms provides him with an internal working model of the social world. Securily attached children will feel more confident and willing once they get older, as this attachment will carry on throughout adolescence and adulthood. An example in the textbook stated that children who have severely attached relationships with their caregivers at age 1 will have more positive emotions later lin life. I do believe, however, that certain experiences and situations later in one's life can influence one's attachment style and well-being. A severely attached person can become anxious/resistant and can have a lower well-being through a signficant, influential experience. Other factors that can influence one's well-being and attachment styles include the environment and family relations.
I agree that the model of social interaction is very important. In secure relationships the child expects the other party to listen intently and respond positively. The child will most likely continue with this model later in life and be more extraverted and secure in talking to strangers because of an expected positive interaction. However, a bad relationship, especially abusive, could change a person's model of social interaction even with a secure upbringing.