Embodiments of the present invention relate to a system and method for discovering knowledge communities. Embodiments of the present invention may comprise providing user access to a network of documents, gathering document access data relating to user access of each document in the network of documents and document authorship and review data, and establishing relationships between users and documents based on the document access data and document authorship and review data. Further, embodiments of the present invention may comprise establishing a network of users that are linked by common document access patterns based on the relationships between users and documents, and clustering communities of users within the network.