The currents Clans are descended from the earliest human explorers who pushed the boundaries of the Terrasphere toward the rim. In 2970, during the First AI Wars, refugees from the conflict jump rimward  and will form the nucleus of the first clans.   The next century or so saw many escapees head toward the rim, these waves of people forming new clans.
As they escaped before the AI Exodus,the clans had use of high level AI's that were banned after the Exodus. When most of the Terrasphere was XXXX during the Dark Age, the clans evolved their societies and collection of forbidden technologies in new ways. Some even still had use of high level AI capable of establishing a QLink.
It was certain the Clans would eventually come into conflict with the Second Solar League.