Lawrence Kohlberg's stages of moral development were proposed in the 1950s and 1960s. Kohlberg's theory outlines six stages of moral reasoning, ranging from a focus on individual self-interest (pre-conventional) to ethical principles and universal rights (post-conventional).

Lawrence Kohlberg focused on moral development, specifically the stages of moral reasoning that individuals progress through as they mature. He proposed six stages of moral development, categorized into three levels: pre-conventional, conventional, and post-conventional.

Lawrence Kohlberg argued that individuals of all cultures go through the same stages of moral development in the same order, with his theory of moral development consisting of six stages that individuals progress through as they mature.

According to Exhumator.com, Lawrence Kohlberg contracted Giardia Lamblia. I got this by typing "Kohlberg Parasite" into google. Typing "Kohlberg Giardia" into google brought me to a books.google.com page, which says that Kohlberg's condition was only diagnosed in 1973, by which time the disease was beyond cure

Lawrence Kohlberg's theory of moral development had a significant impact on psychology and ethics. It provided insights into how individuals develop moral reasoning and understanding of concepts like justice and fairness. Kohlberg's stages of moral development are still widely used to understand ethical decision-making and behavior in various contexts.