Which theorist is known for their work on moral reasoning?

Kohlberg is renowned for his work on moral reasoning, particularly through his theory of moral development. He built upon the foundations laid by Piaget and proposed a staged approach to the development of moral understanding, which he categorized into six distinct levels grouped into three main stages: pre-conventional, conventional, and post-conventional. His research involved observing how individuals make ethical choices and the reasoning behind their moral decisions, which became a central theme in his influential theory. This focus on moral reasoning has provided significant insight into how individuals transition from simple obedience to authority to a more nuanced understanding of justice and ethical principles. Kohlberg's work has had lasting implications in both psychology and education, particularly in the context of character education and ethical decision-making.