Recently I’ve been asked to write a review of a fascinating book by Peter T. Struck: Divination and Human Nature, A Cognitive History of Intuition in Classical Antiquity. While the full book is worth reading for anyone interested in ancient Greco-Roman culture, as well as in the early development of science, there is a whole chapter on Posidonius, one of the major figures of the so-called Middle Stoa, the period during which Stoicism transitioned from its original home in Athens to Rome. Posidonius is a fascinating figure in his own right, and he is often not written about because all we have by him are fragments and indirect sources (as opposed to, say the wealth of stuff by Seneca). Divination is also rarely commented on in Stoic circles, because it is automatically relegated to the category of superstition, something the Stoics were wrong about and that we just don’t need to be concerned with nowadays. But the story is not that simple.