As multiverstorians, it is important for us to remember that every history is an alternate history. There is no timeline that fits two earths identically, so in order to establish a general common history (GCH) we look at a broad range of events that are shared by significantly large numbers of instances to find markers--specific events with a consistent (low-delta) time stamp.

The birth of Buddha (563 B.C.E.), the sack of Rome (410 A.D.), and the invention of the bowling ball (1862), are all examples of events that happened across a wide spectrum of the Humanuum, with dates of occurrence all within the same week. Other events, however, may have a significant impact on a very few number of instances, but barely rate a mention in a general history, such as first contact with aliens (via outer space) in 1964.

The establishment of civilization is usually placed at 10,000 B.C.E., a date which recognizes everything from the invention of agriculture to the invention of the wheel and afternoon naps as extremely stable markers. Before that symbolic marker, history is still largely an exercise in creative storytelling since historical records simply do not exist.

As historians of this “unknowable era” we are in a different business than our colleagues working on more accessible times, and consider ourselves to be “creative conjecturers,” since so much of what we to do is purely speculative. Similarly to our spiritual ancestor, Herodotus, we tell stories to paint pictures of what we think it was like. 

For anyone with an interest in these very ancient times, we can recommend several "historical accounts" to get you started, such as, T.L. Whitworth’s, Trail of the Telepaths, Shming Salivar’s, The First Conquerors, and Bid Wud Do Ro’s, The Fantastic Empire.