We explored the relationship between mother, father, and peer attachment security, empathy, and moral authority in order to clarify certain problems of previous empirical research on such relationships. A sample of 202 Persian-speaking undergraduate students completed questionnaires pertaining to these constructs. The results revealed that mother and father attachment were significantly correlated with family, society welfare, and equality sources of moral authority, whereas peer attachment security was related only to society welfare and equality sources of moral authority. Out of the (...) empathy subscales, only empathic concern was associated with moral authority sources. Empathic concern was also related to mother, father, and peer attachment, whereas perspective taking was correlated with mother and peer attachment. The combination of empathic concern and mother, father, and peer attachment predicted significant amount of variance of ?principle source of moral authority? (including society welfare and equality sources). Findings support existence of a strong relationship between attachment security and the content of moral thought of adolescents, and findings redress an empirical imbalance in research literature on the relation of attachment and morality. (shrink)