The world is subdivided into two camps: Silver = privileged and Red = poor / worthless
The magical aspect in many books is represented very simple. Person X developed without basic force Y or A hero gets chance in a dangerous situation, which force B is activated / out of nowhere. In Red Queen is a little different. In the book it says that the gods had come down, but no longer are nice and friendly, but they control the world with an iron grip. The book does not explain how the Silvers come to their skills or where they come from, but it turns them into something "better". The Reds, the ordinary people who work all their lives to bring it and have to die for the Silvers in wars, have no chance against their tormentors. The Silvers are ice cold and rarely show emotion or humanity. The Silvers are accustomed, they are a little better and have no compassion for their fellow human beings. Why should they? In their eyes Reds are worth nothing. The king himself is ready the life of his Reds in a, for me, senseless war to throw away before he would make sure the Reds and Silvers come the same rights awarded. That changes with Mare Barrow. She is short for it to be sent to war itself, because it has no work. Mare is the only survives with stealing a Red, a young thing. However, this does not last long because she learns by an incident, which she herself has a supernatural ability.
She is Red and Silver at the same time.
Sure, you may not but the book too seriously I thought it was pretty damn good and it can remove anyone who might switch off for a few hours.