This book gathers the monumental investigation made by Jose C. Valadez about the long period of transformation that Mexico went through under Porfirio Diaz s government. With a particular style resulting from his work as a journalist and historian, Jose C. Valades faces the challenge of exploring a period of time where historic memory has characterized as a dark era of national history. Valades mission focuses on salvaging the details of this past that have been eroded by historic prejudice.