The Six Degrees of Separation concept dates back to 1967, when Harvard professor  Stanley Milgram conducted an experiment that determined that most people in the US could be connected within a social network of five or six steps.  (This was a much more benign study than the Milgram Experiment he conducted while at Yale, a frightening examination of obedience to authority.)  The Small World Phenomenon was most interestingly examined in a New Yorker magazine article: Six Degrees of Lois Weinberg.  But to most of the world, Six Degrees refers to actor Kevin Bacon, who founded SixDegrees.org to encourage charitable social networking.  The Six Degrees T-shirt can be yours if you create a Charity Badge at the SixDegrees.org site, and use it to get six people to donate to your charity.  The badge leading to the largest number of donations will receive a $10,000 matching grant.  Or you can show your support by buying the T-shirt at Hanes.com.