Write a summary for the attached article in around 180 wordsHave you ever had an experience like one of these You are at a football gamewhen some people in the crowd stand up and wave their arms in th

Collective behavior is social behavior that is relatively unorganized, spontaneous, and unpredictable. Football games, crowds around street salesmen, riots and rock concerts are all examples of collective behavior. Crowds are groups of people temporarily doing something while physically close to one another, who may not share clear expectations about how to behave and about what will happen. Nearly all crowds share a few traits, such as feeling that something must be done right away to solve a common problem and going along with the actions of others without thinking too much about them. Sociologist Herbert Blumer has identified four types of crowds: casual, conventional, acting, and expressive. The emergent-norm theory explains why crowds seem to act together, as members of a crowd develop a new norm or rule to guide their behavior in a particular situation. French social psychologist Gustave Le Bon believed that the large number of people in a crowd allows our primitive, “animal” side to come out, and we are then very easily affected by the emotion and action of others in the crowd