How much of the Regina Shen series is realistic?

While I hope we can avoid the calamity of rising seas and economic collapse, there are those who would suppress knowledge of the past and knowledge they don’t approve of to suit their aims. We may not have an official caste system, but at times in our history moving up from our birth station has been difficult for many. The places in the story match names on our maps, but after four hundred years have changed in ways to be unrecognizable. In addition, I’ve taken a few liberties for the sake of creating an interesting story. Thus, I believe the conflicts, emotions, and struggles are real, yet this is a futuristic, some might say fantasy type world.