The Challenge of the Times, a collection of 6 lectures by Rudolf Steiner. (From CW 186 which in the original German contains 12 lectures)
1. East and West from a Spiritual Point of View (November 29, 1918)
2. The Present from the Viewpoint of the Present (November 30, 1918)
3. The Mechanistic, Eugenic and Hygienic Aspects of the Future (December 1, 1918)
4. Social and Antisocial Instincts (December 6, 1918)
5. Specters of the Old Testament in the Nationalism of the Present (December 7, 1918)
6. The Innate Capacities of the Nations of the World (December 8, 1918)