The Romans have provided a lot of writers with a model for various interstellar empires, of course, and no wonder. The Roman Empire is a really good example of a large empire that, in one form or another, functioned for quite a long time over a very large area. And over all that time, there was all sorts of exciting drama - civil wars and assassinations and revolts and bits breaking off and being forced back in ... But I didn't want my future - however fanciful it was - to be entirely European. The Radchaai aren't meant to be Romans in Space.
Ann LeckieWithout feelings insignificant decisions become excruciating attempts to compare endless arrays of inconsequential things. It's just easier to handle those with emotions.
Ann Leckie