Google and many other large platforms are driving the development of personalization forward significantly: Users on the internet only see what aligns with their profile. This can be useful: When a passionate golfer types in the keyword "golf," they learn everything about their favorite sport, while a car enthusiast only receives information about the VW Golf. However, the political consequences are severe: We only receive news that aligns with our established beliefs, and differing viewpoints pass us by. And because we don't know which information has been filtered, we don't even notice it. In his book, Eli Pariser boldly speaks out against the ruthless big players of the internet who sacrifice diversity of opinion and broad political discussions at the altar of their profits.