The World of The Sovereign Stars!

In the year 2052, physicist Mark Holder discovered the Slipstream drive and humanity reached for the stars and began to colonize the galaxy. For centuries, humans continued to populate system after system without coming into contact with intelligent alien life. But man is a natural predator, warlike and greedy. After many generations of minor warfare, humanity faced a near-extinction-level event remembered now only as The Purge.