Final answer:
The highest stage of moral development is post-conventional, where decisions about morality depend on abstract principles and the value of all life.
Step-by-step explanation:
The highest stage of moral development is post-conventional. At this stage, individuals make decisions about morality based on abstract principles and the value of all life.
In Lawrence Kohlberg's theory of moral development, the post-conventional stage is the final stage. It is characterized by individuals thinking of morality in abstract terms and recognizing that legality and morality may not always align. Examples of post-conventional morality include the belief in the right to life, liberty, and the pursuit of happiness.
According to Kohlberg, only a few people fully achieve this highest stage of moral reasoning.