Imagine this scenario. After a long drive to the airport, you’ve just taken off on a fifteen-hour flight. You’re in coach, and a family of three is sitting behind you—a man, a woman, and a toddler. They seem nice. But, as the flight continues, the kiddo grows restless. She kicks your seat and pokes her toys into your shoulder.“Stop that,” you hear the father say. The toddler, incredibly, quiets down. The cabin lights dim. It’s time to sleep. Yet just as rest closes in, you sense motion: the seat in front of you is reclining. You watch as it comes all the way back. Now you feel cramped, with someone else’s seat in your face; you also notice some stiffness in your shoulders. Your fingers caress your own recline button. Surely the reclined-upon are entitled to recline? Just as you start to le