There certainly is a point to be made for groups. Each individual feeds of the others. If one has an idea, another might be able to use it creatively. All the great artistic movements had at their core a group, from the medieval artists' guilds to the Factory. Literary currents developed in much the same way. Scholars are grouped in universities, marketers and advertisers form ad agencies; all are incubators. Surely the blogosphere has a similar function.