Circular altruism at Overcoming Bias

I am a big fan of Overcoming Bias, a blog who "want to avoid, or at least minimize, the startling systematic mistakes [in human reasoning] that science is discovering. If we know the common patterns of error or self-deception, maybe we can work around them ourselves, or build social structures for smarter groups. We know we aren't perfect, and can't be perfect, but trying is better than not trying."

I just wanted to recommend one of their post on "Circular Altruism" that explores the relationships between probabilistic reasonings, its biases, and altruism.