Abstract: Systems and methods for searching text and textual content, and retrieving and summarizing and interpreting search results, are provided. The inventive systems and methods obtain content or are configured to be applied to content. The systems and methods review all of the content, creating one or more data collections of Related-Concept and Themes, and statistical relations between Related-Concepts and Themes. When a user enters a search query, the systems and methods present the user with Related-Concepts and Themes that match the search query, and the user can iteratively select Related-Concepts and Themes, and in response the present invention will narrow or broaden the search and display an altered documents results set and different Related-Concepts and Themes. The systems and methods then provide the user with interpretation about the content in the form of summaries or conclusions based on the Related Concepts and Themes.