Marxists Internet Archive (also known as MIA or Marxists.org) is a non-profit website that hosts a multilingual library (created in 1990) of the works of Marxist, communist, socialist, and anarchist writers, such as Karl Marx, Friedrich Engels, Vladimir Lenin, Leon Trotsky, Rosa Luxemburg, Che Guevara, Mikhail Bakunin and Pierre-Joseph Proudhon, as well as that of writers of related ideologies, and even unrelated ones (for instance, Sun Tzu and Adam Smith). The collection is maintained by volunteers, and is based on a collection of documents that were distributed by email and newsgroups, later collected into a single gopher site in 1993. It contains over 53,000 documents from over 600 authors, and in 61 languages.