In his best-selling book Tipping Point, Malcolm Gladwell examines the concept of influential individuals and how they impact the spread of trends and change. He categorizes them into three groups: Connectors, Mavens and Salesmen.
We all know one or more Connectors: people who seem to know everyone. People through whom you could reach a very large population. Mavens on the other hand, are those who are considered experts in a given field by their peers, who know the answer to any question related to that field and to whom everyone they know turns when they have a question or need advice.