Prelude to Lecture on Manilius: places, joys, and 'the Hellenistic TRADITION'.

This is an introductory section to a lecture I recently gave on Manilius and the planetary joys. I had to cut most of the material in the actual lecture because of time constraints, but I've decided to include the full version here because I think the issues raised are worth exploring in their own right. In this video, I discuss the concept of the places in ancient astrology and whether they should be conceived as referring to concreta or abstracta, and I examine the nature of tradition in "Hellenistic" astrology.