Kohlberg has also been criticized for proclaiming the principle of justice the sole occupant of the highest stage of moral thought without having sufficient cause to deem it more worthy than several other virtues that might have been selected-for example, sympathy , concern for others, courage, integrity ,or autonomy. As Peters wrote , Kohlberg ‘ s findings are of unquestionable importance, but there is a grave danger that they may become exalted into a general theory of moral development. Any such general theory presupposes a general ethical theory, and Kohlberg himself surely would be the first to admit that he had done little to develop the details of such a general ethical theory. Yet without such a theory the notion of “moral development” is pretty unsubstantial.