Kohlberg's stages of moral development is a theory proposed by psychologist Lawrence Kohlberg that outlines how individuals progress in their understanding of morality. The theory consists of three main levels: pre-conventional, conventional, and post-conventional, each containing two stages. In the pre-conventional level, moral reasoning is based on self-interest and avoiding punishment. The conventional level focuses on societal norms and the importance of maintaining social order. In the post-conventional level, individuals develop a more abstract understanding of morality, guided by personal principles and values. This level emphasizes justice and the rights of individuals, often leading to moral reasoning that transcends societal rules. Kohlberg's theory highlights the complexity of moral development throughout a person's life.