27. A method to enable improved analysis and use of sociological data, the method comprising: identifying causal relationships between a plurality of documents; identifying a plurality of characteristics of a communication, including a modality used, actors involved, and proximate events of relevance; enabling a user to query based on all of the characteristics available; analyzing communications to identify normal paths of communication between actors; and identifying a communication to which, according to the normal paths of communication, a particular actor should have been invited but was not.
28. The method of claim 27 , wherein the communication is a meeting event.