collective behavior

Summary

  Collective behavior is conception that contain non-organized group action and organized social movement. It contain crowds, panic, riots, mass hysteria, fads, rumors.

  Crowd is accident group that organized without same, or common rules and organization.
  Theories of crowd behavior contain contagioin theory, convergence theory, emergent-norm theory, gatherings.

  Panic is accident and temporary situation about certain phenomenon in group.
  In article, there explain moral panic.

  Riot is situation that non-organized group happens violent behavior naturally.

  Rumor is groundless speaking which has spreading fast, speedy feature.

Opinion, Learned things

  There are many examples of collective behavior, and I am interested about them in terms of sociology. Also, I think Collective behavior is similiar to collective action. So, thinking about relations of individual and group is one of relative conceptions.

Question

  Why people organize some group?

explanation of collective bahavior