O although film acting stretches back more than a century- has involved people in many countries. O half-million people who have ever acted in films form a pretty small world. O travers, milgram (1969) conducted study: asked 300 randomly selected people in nebraska and kansas to mail a document to a complete stranger, a stockbroker in boston. O however, the people could not mail the document directly to the stockbroker. They had to mail it to a person they knew on a first-name basis who, in turn, could send it only to a person they knew on a first-name basis, and so forth. O defined this passing of a letter from one person to another as a link or a degree of. O separation thought it would take many degrees of separation, to get the letter to boston stockbroker- the average was about six. O no more than six degrees of separation separate any two people in the united states.