You’ve Got to Have (150) Friends (via NYTimes)

The critical component in social networking is the removal of time as a constraint. In the real world, according to research by myself and others, we devote 40 percent of our limited social time each week to the five most important people we know, who represent just 3 percent of our social world and a trivially small proportion of all the people alive today. Since the time invested in a relationship determines its quality, having more than five best friends is impossible when we interact face to face, one person at a time.

JNOMICS