English Language · English

Read the given passage and answer the question that follows. Sigmund Freud was an Austrian neurologist who is credited with developing the field of psychoanalysis. He is considered one of the most influential thinkers of the Twentieth Century. Freud was brought up in Leipzig and Vienna, where he attended a prominent school. Freud proved an outstanding student, excelling in languages, and English literature. At the age of 17, Freud joined the medical facility at the University of Vienna to study a range of subjects, such as philosophy, physiology and zoology. Freud graduated in 1881 and began working at the Vienna General Hospital. While working in different medical fields, Freud continued his own independent reading. He was influenced by Charles Darwin's relatively new theory of evolution. He also read extensively Friedrich Nietzsche's philosophy. Other influences on Freud included works on the existence of the subconscious, by writers such as Brentano and Theodor Lipps. What is the central theme of the passage?