Why did people at the turn of the 20th century take a particular interest in the studies of the subconscious?

People in the early 20th century were intrigued by the studies of the subconscious due to a growing interest in psychology and the belief that the subconscious mind plays a significant role in shaping thoughts, emotions, and behavior. This era also saw the emergence of psychoanalysis, led by Sigmund Freud, which delved into the subconscious as a key to understanding human behavior and mental health. This shift towards exploring the subconscious provided new insights into the complexities of the human mind and behavior.