In Divergent, power is all about making other people do what you want them to do. (It's kind of like advertising in that way.) There's the straightforward power of Dauntless, who beat people up and destroy things. Then there's the more complicated, more manipulative power of Erudite, who want to control things, either through newspapers changing people's opinions or just, you know, controlling people's minds directly. And then there's Abnegation, whose power lies in sacrifice, which makes them stand out.