> The downside of going for size and scale above all else is that the dense, interconnected pattern that drives group conversation and collaboration isn’t supportable at any large scale. Less is different — small groups of people can engage in kinds of interaction that large groups can’t. And so we blew past that interesting scale of small groups. Larger than a dozen, smaller than a few hundred, where people can actually have these conversational forms that can’t be supported when you’re talking about tens of thousands or millions of users, at least in a single group. [source](http://www.shirky.com/writings/herecomeseverybody/group_enemy.html)