This compilation of primary sources documents the history and tradition of liberal thought in Argentina throughout the 19th and first half of the 20th century. With only two exceptions, none of the works have ever been translated into English until now. Liberal ideas were very important in Argentina from the time of independence. The Argentine constitution (1853-60), in force for a long time, was based on liberal principles taken from both the North American and the European tradition. The general structure of the collection is chronological, taking the reader through an analysis of different periods of liberal thought in Argentina.