Earth has a long history of war, oppression, and violence. Well, from themselves. Mommy, that's silly. You have to place your mind into their context. This is not easy to do.
Earth is very different from Mars.
I know, neither do I, but on Earth, the economy is based on fear. Everything, it seems, is based on fear. Sky was incredulous. Why would anyone run a world that way, she thought. It's difficult to know where to begin.