A patient reclining on a vast velvet divan narrates his life history in a dimly lit room. Meanwhile, the therapist twiddles his thumbs through a 50-minute hour. This classic psychoanalysis scene has become one of the most pervasive images of therapy today, thanks in part to Sigmund Freud.

Freud’s influence on popular culture and the way we view psychology is undeniable. Ever been called “anal retentive”? Heard about the Oedipus complex? The image Freud left behind fails to capture the field of psychology as it has evolved over the decades since his work. However, the novelty of his approach is often ignored in favour of caricatures of a sex-obsessed old Austrian guy.

Among his most influential ideas, Freud hypothesized about the unconscious. His psychoanalytic theory provided an explanation for behaviour based on the interaction between conscious and unconscious drives.

According to Freud, personality is divided into three components: the id, the ego, and the superego. The interactions between these three components explain how our behaviour is shaped by conscious and unconscious drives. The conscious mind is regulated by the ego, which interacts directly with the outside world and acts as the decision-maker. The subconscious is divided into the id and the superego. The id acts as the primitive and instinctive component of personality, and tries to influence the ego to act on impulses and whims, regardless of what is proper or right. While the id acts on the pleasure principle, the superego counteracts it, and follows a moral principle. The superego is the moral force behind our actions, and regulates the ego’s interactions with the world. According to Freud, all three of these components are distributed differently in individuals, which explains how we behave according to unique motivations.

Freud also famously theorized about the “psychosexual” stages of development in childhood. He believed that personality is dependent on our experiences as children. Each stage of development corresponds with a part of the body that is stimulated during that period. For example, the second stage in development, which occurs in children two to three years old, is called the anal stage because children are more aware of (and according to Freud, derive erotic pleasure from) their bowel movements. It is also the typical time for potty-training in most children. Depending on the level of stimulation received at each stage, the child will acquire various personality traits, or in Freudian terms, fixations or retention. For example, an anal retentive person is someone who was potty-trained too early, or too strictly in their development. The resulting personality in adulthood involves obsession with orderliness and small details.

While many psychologists have criticized Freud’s views of human personality and behaviour for being too focussed on sex, the historical and social background to his theories is important. When you think of his primary clientele—affluent and sexually repressed Austrian women in the 1920s—his theories make more sense.