The bonds of behaviour.
Of all the theories purporting to uncover the roots of childhood behaviour and its extension into adult behaviour, the most cogent relates to the physical and psychological bonds of attachment between infant and mother. It is helpful to divide the human lifespan into three periods, each of which has alternating phases of attachment and detachment.
D000293:Adolescent; D000328:Adult; D001940:Breast / Q000502:physiology; D002648:Child; D002652:Child Behavior; D002657:Child Development; D002675:Child, Preschool; D003643:Death; D005333:Fetus; D006127:Group Structure; D006801:Humans; D007062:Identification, Psychological; D007223:Infant; D007231:Infant, Newborn; D007398:Interpersonal Relations; D008568:Memory; D009034:Mother-Child Relations; D010920:Placenta / Q000502:physiology; D012904:Smiling