How do the bonds of attachment form between parents and infants?

Attachment starts at birth and sets the stage for the development of a child. Without it a person doesn't feel secure, loved, or taken care of. When this happens they are unable to bond with others all the rest of their lives and suffer from an attachment disorder. People need each other and without bonds forming they are unable maintain a relationship with other people in school, business , or in a love relationship. They push people away and think they will be left alone. Their behavior eventually does prove that what they feel is true.