The Human Soul in Relation to World Evolution. A set of 9 lectures by Rudolf Steiner. Given in 1922 in Dornach. (CW 212)
For your convenience, below is a zip file of this entire set of lectures. It does require that you have an unzipping utility of some kind on your computer. For you mac people this is built in.
The Entire Book The Human Soul in Relation to World Evolution