Societies construct patterns of behavior by deeming certain actions or speech as acceptable or unacceptable. These patterns of behavior within a given society are known as societal norms. Societies, and their norms, undergo gradual and perpetual changes.
Insofar as it is collaborative, a society can enable its members to benefit in ways that would otherwise be difficult on an individual basis; both individual and social (common) benefits can thus be distinguished, or in many cases found to overlap. A society can also consist of like-minded people governed by their own norms and values within a dominant, larger society. This is sometimes referred to as a subculture, a term used extensively within criminology.
More broadly, and especially within structuralist thought, a society may be illustrated as an economic, social, industrial or culturalinfrastructure, made up of, yet distinct from, a varied collection of individuals. In this regard society can mean the objective relationships people have with the material world and with other people, rather than "other people" beyond the individual and their familiar social environment.
"Jack the Ripper" is the best known pseudonym given to an unidentified serial killer active in the largely impoverished areas in and around the Whitechapel district of London in 1888. The name originated in a letter by someone claiming to be the murderer that was disseminated in the media. Attacks ascribed to the Ripper typically involved women prostitutes from the slums whose throats were cut prior to abdominal mutilations. Rumours that the murders were connected intensified in September and October 1888, and extremely disturbing letters from a writer or writers purporting to be the murderer were received by media outlets and Scotland Yard. Mainly because of the extraordinarily brutal character of the murders, and because of media treatment of the events, the public came increasingly to believe in a single serial killer, Jack the Ripper. Extensive newspaper coverage bestowed widespread and enduring international notoriety on the Ripper. An investigation into a series of brutal killings in Whitechapel up to 1891 was unable to connect all the killings conclusively to the murders of 1888, but the legend of Jack the Ripper solidified. As the murders were never solved, the legends surrounding them became a combination of genuine historical research, folklore, and pseudohistory. The term "ripperology" was coined to describe the study and analysis of the Ripper cases. There are over one hundred theories about the Ripper's identity, and the murders have inspired multiple works of fiction.