This August, I began teaching at a school in Manhattan. I was working in the faculty lounge (a fairly small space where a lot of supplies are stored), and one of the other teachers mentioned, “Wow, they did a great job organizing this room! You should have seen it last year.” I was struck by how much the clean, orderly, cared-for space was appreciated by my co-workers. Now I’ve been there for a couple of months, and slowly but surely, the faculty lounge has begun to suffer the “tragedy of the commons.”