Abstract: A system and method for determining polarization in a plurality of documents, which may be grouped in a variety of ways, for example according to publication source. The polarization may be determined according to an analysis of the document itself and/or of the publication source of the document. Optionally, topic modeling is performed on one or more documents from one or more sources as part of the above analysis. One or more topic models may then be applied for tagging one or more such documents.