Writer revolutionary effect are Nicolaus Copernicus, who wrote "De revolutionibus orbium coelestium" (1543); Charles Darwin, who wrote "On the Origin of Species" (1859); and Sigmund Freud, who wrote "The Interpretation of Dreams" (1899). These three highly influential, and initially very controversial, works changed the way people understood their place in the world. Copernicus's heliocentric view of the cosmos displaced humans from their previously accepted place at the centre of the universe; Darwin's evolutionary theory placed humans firmly within, as opposed to above, the order of nature; and Freud's ideas about the power of the unconscious mind overcame the belief that humans
The Dream - Introduction into the Psychology of Dreams fascinated by the putative meaning of their dreams and desired to discover their unconscious selves by means of interpreting them. In the following years, Silberer noticed that while the literature on the interpretation of dreams was increasing in amount and complexity, general information on basic elements of dreams was deficient. Therefore, he began to give public lectures on fundamental knowledge about dreams as well as his specific findings in this field in Vienna. After various listeners of one of such lectures had assured him that he had succeeded in providing an understandable introduction into the psychology of dreams, Silberer decided