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Six degrees of separation. Six degrees of separation. Early conceptions[edit] Shrinking world[edit] Theories on optimal design of cities, city traffic flows, neighborhoods and demographics were in vogue after World War I. These[citation needed] conjectures were expanded in 1929 by Hungarian author Frigyes Karinthy, who published a volume of short stories titled Everything is Different.

One of these pieces was titled "Chains," or "Chain-Links. " The story investigated in abstract, conceptual, and fictional terms many of the problems that would captivate future generations of mathematicians, sociologists, and physicists within the field of network theory.[1][2] Due to technological advances in communications and travel, friendship networks could grow larger and span greater distances.

In particular, Karinthy believed that the modern world was 'shrinking' due to this ever-increasing connectedness of human beings. A fascinating game grew out of this discussion. Small world[edit] Research[edit] Computer networks[edit] Mark Granovetter. Mark Granovetter (born October 20, 1943) is an American sociologist and professor at Stanford University[1] who has created theories in modern sociology since the 1970s. He is best known for his work in social network theory and in economic sociology, particularly his theory on the spread of information in social networks known as "The Strength of Weak Ties" (1973).[2] Background[edit] Granovetter earned an A.B. in History at Princeton University (1965) and a Ph.D in Sociology at Harvard University (1970).

At Harvard he studied under the supervision of Harrison White. He is currently the Joan Butler Ford Professor in the School of Humanities and Sciences at Stanford and is the chair of the Department of Sociology. He worked at Northwestern University, the State University of New York at Stony Brook, and Johns Hopkins University.[3] Major ideas[edit] The strength of weak ties[edit] Economic sociology: Embeddedness[edit] "Tipping points" / threshold models[edit] Security influence[edit] Generation. Generation is the act of producing offspring.

In kinship terminology, it is a structural term designating the parent-child relationship. It is also known as biogenesis, reproduction, or procreation in the biological sciences. The term is also often used synonymously with cohort in social science; under this formulation the term means "people within a delineated population who experience the same significant events within a given period of time. "[1] Generation in this sense of birth cohort, also known as a "social generation," is widely used in popular culture, and has been the basis for much social analysis. Etymology[edit] The word generation comes from the Latin generāre, meaning "to beget".[2] Familial generation[edit] Five generations of one family—a child with her mother, grandmother, her great-grandmother and great-great-grandmother. Social generation[edit] The U.S. baby boom generation is seen here as the widest bulge (ages 35-44) of the 2000 Census data. Generational theory[edit]

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