Sigmund Freud was an Austrian neurologist and the founder of psychoanalysis.
Erich Fromm was a German-American social psychologist and philosopher who significantly impacted the fields of humanistic psychology and psychoanalysis, advocating for individual freedom and societal change.
Ibn Sina, also known as Avicenna, was a Persian polymath, philosopher, and physician whose extensive works laid foundations in various fields, including medicine, philosophy, and logic.