Sweep of the Blade (Innkeeper Chronicles, #4)

by Ilona Andrews

“Very well. It goes back to the Law of Bronwyn.” The galaxy had very few universal laws, but the Law of Bronwyn had proven true again and again, so often that it was simply accepted. “Once a species is introduced to interstellar spaceflight, it will advance technologically but not socially,” Nuan Cee said.