 In the Song, Yuan, and Ming dynasties, Confucians were interested in the nature and psychological structure of virtues, particularly the virtues concerned with fostering and upholding good human relationships. They saw their emphasis on the virtues of human relationships as distinguishing them from Daoists and Buddhists, insofar as the latter two groups tended to promote a concern with personal salvation (which struck some Confucians as slighting moral virtue) and with non-attachment (which many saw as incompatible with having meaningful human relationships).