In the study of history as an academic discipline, primary source constitute the raw material of history. They include all the documents, testimonies, recordings or objects that convey significant information regarding the events that have taken place, especially in the past. Within them, and considering the value that others also have, written sources are the basic support for building history.
The historian works historical sources to obtain from them as much information as possible. It must also attend to its variety, making an appropriate selection of them.
The origin of the 1905 revolution goes back to the recently-concluded Russo-Japanese War, in which Japan placed a serious check on Russia's power to expand in East Asia. Many Russians saw this outcome as a source of humiliation, and supported an effort to remove the Tsar because of it.
