Which researcher proposed three categories of morality in their study?

Lawrence Kohlberg proposed a well-known framework for understanding moral development, which is categorized into three main levels: pre-conventional, conventional, and post-conventional morality. This framework is based on his extensive research involving moral reasoning, particularly through analyzing how individuals make ethical decisions at different stages of their life.

Kohlberg's theory posits that moral reasoning progresses through a series of stages, with each stage representing a different way of thinking about right and wrong. The pre-conventional level focuses on self-interest and obeying rules to avoid punishment; the conventional level emphasizes adherence to social norms and laws; and the post-conventional level reflects a more abstract reasoning about universal ethical principles. His research highlighted how people move through these stages over time, showcasing a developmental perspective on moral reasoning.

Understanding Kohlberg's contributions is crucial, as they underscore the complexity of moral thought and the evolution of ethical principles in individuals, highlighting why he is recognized for his categorization of morality.