Every time I think I am out, they pull me back in. No, not leading the mafia. Principal-agent theory. Yep, and I blame Stan Lee. How so? I saw the new Captain America: Civil Wars movie... explanation below the break: The entire movie is essentially about who guards the guardians (a title used more than once for civ-mil relations books)--who is the principal that oversees the agents? This is the classic question in civil-military relations--who oversees the folks with the guns? We take it for granted in democracies in part because it is an essential ingredient. But scholars have not. ...