There are no white-haired moguls or bank chairmen on the Details Power 50, no one who holds court in Davos or at David Geffenís beach house. Because, as anyone who understands power knows, it isnít about corner offices and cocktail-party invitations—itís about the space in your head. And the men who have it are the ones who control your viewing patterns, your buying habits, your anxieties, your lust—the things you think about. So on this list, Silicon Valley overlords rub shoulders with Father of the Year Kevin Federline, preachers consort with pornographers, and those fresh-scrubbed, inescapable kids from High School Musical 2 walk the halls with the new wave of school shooters. These are the people who have taken over the space in your head—whether you like it or not.