Fritz Perls was a German-born psychiatrist and psychotherapist, best known for co-founding the Gestalt therapy movement in the mid-20th century. He emphasized personal responsibility and the importance of being aware of one's thoughts, feelings, and actions in the present moment. His approach aimed to help individuals gain insight into their experiences and improve their emotional well-being. Perls was also a prominent figure in the humanistic psychology movement, which focused on individual potential and self-actualization. He developed various techniques, including the "empty chair" technique, to facilitate self-exploration and enhance therapeutic outcomes. His work has had a lasting impact on psychotherapy and continues to influence modern therapeutic practices.