I'm a bit mystified by how cooperation became a "virtue and comparative advantage of rationalists". I understand why culturally, but if you start from the first principles, it doesn't follow. In a consequentialist framework there is no such thing as virtue, the concept just doesn't exist. And cooperation should theoretically be just one of the many tools of a rationalist who is trying to win. In situations where it's advantageous she'll cooperate and where it isn't she won't.
Nope, I play on a PC.
Rationality is systematized winning. If failure to cooperate keeps people like us from winning then we should make cooperation a virtue and practice it when we can. (I'm literally playing Overwatch while I answer this.)
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.