Stanley Milgram from the '60s and '70s, the creator of the small-world experiments, which became later popularized as six degrees of separation, made the point that any two arbitrarily selected people were likely connected from between five to seven intermediary steps.
استنلى ميلگرام از دهه‌هاى ٦٠ و ٧٠، خالق تجربه‌هاى دنياى كوچك، كه بعداً به اندازه شش درجه از جدايى محبوب گرديد این نكته را روشن كرد كه از هر دو آدمی که بطور قراردادى انتخاب می‌شوند احتمالاً بواسط ۵ تا ۷ نفر بهم وصل بوده‌اند.