This document discusses competing with social networks by linking sociology with strategy. It provides a framework that outlines social failures where people do not always have the interactions they want, social solutions where social platforms can facilitate interactions, and social strategy where existing firms can also facilitate interactions if people undertake tasks for free. The document then gives examples of social strategy used by companies like Zynga, Yelp, Wikipedia, American Express, Nike, Harvard Business Review, and Cisco. It also outlines social solutions provided by platforms like eHarmony, MeetUp, Twitter, mixi, Facebook, LinkedIn, and Friendster.