Polarities in the Evolution of Mankind CW 197, eleven lectures by Rudolf Steiner given to members of the Anthroposophical Society in Stuttgart, 5 March to 22 November 1920.
1. Lecture 1: (Stuttgart, March 5, 1920)
2. Lecture 2: (Stuttgart, March 7, 1920)
3. Lecture 3: (Stuttgart, March 9, 1920)
4. Lecture 4: (Stuttgart, June 13, 1920)
5. Lecture 5: (Stuttgart, June 24, 1920)
6. Lecture 6: (Stuttgart, July 25, 1920)
7. Lecture 7: (Stuttgart, July 30, 1920)
8. Lecture 8: (Stuttgart, September 21, 1920)
9. Lecture 9: (Stuttgart, November 8, 1920)