Jacob L. Moreno was a Romanian-American psychiatrist and the founder of psychodrama, a therapeutic approach that uses guided drama and role-playing to help individuals explore their emotions and experiences. Born in 1889, he developed innovative techniques to enhance personal and social development, emphasizing the importance of spontaneity and creativity in therapy. Moreno also contributed to the field of sociometry, which studies social relationships and group dynamics. His work laid the foundation for understanding how individuals interact within groups, influencing various fields such as psychology, education, and organizational development. He passed away in 1974, leaving a lasting impact on mental health practices.