social network analysis
social life
concepts
processes and institutions
In 1967, the social psychologist Stanley Milgram conducted a seminal experiment to test the hypothesis that scattered members of any large social network (in his case, the population of the United States) could be connected to each other through short chains of intermediate acquaintances. To test this contention, Milgram introduced a novel technique. [Source: Encyclopedia of Community: From the Village to the Virtual World; Small World Phenomenon]
small world phenomenon