The distant past is largely lost to Vectors. The elements of the world’s history that were recorded describe the growth of a decentralized, global community on Terra linked by mobile communication and an independent spirit that would not be bound by government law. This is in some ways a racial myth, the legendary ancestors that freed vectors from humanity 700-ish years ago. It’s filtered through a corporation that constantly revises “truth,” and a massive loss of information from the destruction of Terra and the emotional breakdown of humanity that followed.
The actual year the geomat was created or earth was destroyed are shrouded by “canon doubt and uncertainty.” Conversations with the game author suggest that the fictional HSD universe begins at least 150-200 years now, far enough out that anything’s possible, and a safe distance so that the product’s publication date won’t lap the future.