Jacob Levy Moreno was an Austrian-American psychiatrist and the founder of psychodrama, a therapeutic approach that uses guided drama and role-playing to help individuals explore their emotions and relationships. Born in 1889, he emphasized the importance of social interactions and creativity in mental health. Moreno also developed the concept of sociometry, a method for measuring social relationships within groups. His work laid the foundation for group therapy and influenced various fields, including psychology, education, and theater. He passed away in 1974, leaving a lasting impact on the understanding of human behavior and interpersonal dynamics.