Societies are classified according to their development and use of technology. For most of human history, people lived in preindustrial societies characterized by limited technology and low production of goods. After the Industrial Revolution, many societies based their economies around mechanized labor, leading to greater profits and a trend toward greater social mobility. At the turn of the new millennium, a new type of society emerged. This postindustrial, or information, society is built on digital technology and nonmaterial goods.
Émile Durkheim believed that as societies advance, they make the transition from mechanical to organic solidarity. For Karl Marx, society exists in terms of class conflict. With the rise of capitalism, workers become alienated from themselves and others in society. Sociologist Max Weber noted that the rationalization of society can be taken to unhealthy extremes.
Society is based on the social construction of reality. How we define society influences how society actually is. Likewise, how we see other people influences their actions as well as our actions toward them. We all take on various roles throughout our lives, and our social interactions depend on what types of roles we assume, who we assume them with, and the scene where interaction takes place.