"They discovered that the decisive paths of the "informed individuals"
began attracting followers who in turn created a self-organizing unit,
and that as the size of the crowd grew, it took fewer and fewer
"informed individuals" to steer the collective course. In groups of
200 or more, it took fewer than 5 percent to guide the masses."

http://tinyurl.com/5safs4

www.peoplewho.org