A crowd is a large group of people that are gathered or considered together. A crowd may be definable through a common purpose or set of emotions, such as at a political rally, a sports event, or during looting (this is known as a psychological crowd), or may simply be made up of many people going about their business in a busy area. The term “the crowd” may sometimes refer to the lower orders of people in general.
Social aspects are concerned with the formation, management and control of crowds, both from the point of view of individuals and groups. Often crowd control is designed to persuade a crowd to align with a particular view (e.g., political rallies), or to contain groups to prevent damage or mob behaviour. Politically organised crowd control is usually conducted by law enforcement but on some occasions military forces are used for particularly large or dangerous crowds.