When Hungarian author, Frigyes Karinthy wrote on on the idea that every person in this planet Earth can be connected to anybody else, perhaps he didn't realize the impact on our social life today. He hypothesise that any two individuals can be connected through at most 5 acquaintances.
As our life get more modern and complicated, actually our world get smaller due to technological advancement especially in telecommunication industry. The 6 degree of separation theory, became the basis of several famous social networking application such as Facebook, Linkedin, etc. In fact, Facebook which has 4.5 million users (as of April 2007, and counting.. cause I just joined in), calculate that the average separation of their users is 5.73 degrees, with the farthest separation is 12.
Several high rating TV series adopt this idea, such as LOST, Six Degrees, Lonely Planet Six Degrees. in LOST, all the characters are link and connected to each other in connection that they don't realized or understood. International award-winning and local film also embrace this sociological idea, such as Crash, Babel.. and CINTA..
So perhaps, if one day I meet you on the street, restaurant, bus station, or anywhere else...just remember, we are no stranger... we are friends within 5 steps away or less.
By the way, we are all son of Adam (A.S.) and Eve.