Lawrence Kohlberg was an influential American psychologist best known for his work in moral development. He built upon the ideas of Jean Piaget to propose a theory consisting of six stages of moral reasoning, grouped into three levels: pre-conventional, conventional, and post-conventional. These stages reflect a progression in moral understanding from a focus on self-interest to a more abstract understanding of justice and human rights. Kohlberg's research involved presenting subjects, primarily children, with moral dilemmas to analyze their reasoning processes. His findings suggested that moral reasoning develops in a varied manner, and individuals may not progress through the stages in a linear fashion. This theory has been influential in education, psychology, and even law, shedding light on how moral reasoning might aid people in making ethical decisions. Despite its significant impact, Kohlberg's work has faced criticism, particularly concerning its cultural biases and emphasis on justice over other moral values. Critics argue that moral development varies across cultures, and his model may overlook the complexity of moral reasoning influenced by social relationships and care. Nonetheless, Kohlberg's contributions to psychology remain vital in understanding moral development and ethical reasoning in humans. Lawrence Kohlberg was an eminent American psychologist renowned for his contributions to the field of moral development. He developed a theory outlining six stages of moral reasoning, organized into three core levels that reflect the evolution of ethical understanding. Despite some criticism regarding cultural biases, Kohlberg's work has vastly influenced psychology, education, and law by highlighting the complexities of moral reasoning.