Chapters 4, 5, 7, 10, and 11 of Hayek's Road to Serfdom trace the natural evolution of social-welfare states like the Weimar Republic (i. e., Germany in 1919-33). This material is highly recommended as supplemental reading to our analysis of the mixed economy. F. A. Hayek, The Road to Serfdom, 50th anniversary ed. (Chicago: University of Chicago Press, 1994) (more information).