This document discusses several major intellectual revolutions throughout history: - The pre-Socratic revolution questioned the nature of the universe and heavenly bodies. - The Copernican revolution established that the sun, not Earth, is the center of our solar system through Copernicus' heliocentric model. - Darwin's theory of evolution by natural selection proposed that all life evolved over time from common ancestors through a process of natural selection. - Freud's psychoanalytic theory introduced the concepts of the conscious and unconscious mind and how they influence human behavior and development. Each of these revolutions transformed society by challenging established beliefs and sparking new ways of understanding the world.