They've lived in orbit around planet Lumus for centuries and, for all they know, no one else exists but them. However, they don't know how their race got here. No history book has an answer and no historian has the guts to find out. It's as if the history of their race, the human race, originated in orbit around this planet. Any knowledge of their distant past has either been erased or their Prime Director is correct - they were birthed here. They know of no enemy, no threat, no carnage, and because of this they aren't prepared for what's coming.
"Good story frustratingly badly written"