what has already happened
The past is not unchanging. Often we learn new things which change our understanding of what past events truly meant and create new appreciations of how things really fit together. A story that focuses on the Past may be much more than a documentation of what happened. Frequently it is a re-evaluation of the meaning of what has occurred that can lead to changing one's understanding of what is happening in the present or will eventually happen in the future.
syn. history, what has happened, former times, retrospective