A Clan is an organization that pursues an end, its members have in common a series of characteristics that make them faithful to the cause that keeps them constituted as a group. In general, the people who make up a clan have a strong friendship or family bond, tragic episodes that mark life are usually those that define the behavior and the similarity between the beliefs of one person and another within a clan. Etymologically, the term Clan comes from the Scottish Gaelic Clann which means "Descent" and in turn it is related to genealogical trees, so we can deduce that clans are organizations that in their time were only made up of members of a family or a very small or close social nucleus.
The most essential thing about a Clan is the origin of the objective they seek or the guidelines by which they are governed. In general, a clan has the purpose of maintaining the designs of a homonymous leader, spiritual, religious or of very relevant social importance at a time or moment in contemporary history.
There are clans that have resulted from concentrations of people who hate something in society, and who prefer to maintain a certain despotism for the events that happen thanks to their pretexts. One of the most famous has been the Ku Klux Klan, a faction of society characterized by wanting to wipe out people of color, homosexuals and all tendencies and races that were not white and "pure" in their perception.