There is strength in weak ties, as the sociologist Mark Granovetter has observed. Our acquaintances—not our friends—are our greatest source of new ideas and information.
The Internet lets us exploit the power of these kinds of distant connections with marvellous efficiency.
Facebook and the like are tools for building networks, which are the opposite, in structure and character, of hierarchies. Unlike hierarchies, with their rules and procedures, networks aren’t controlled by a single central authority. Decisions are made through consensus, and the ties that bind people to the group are loose.