Scott reviews 'Ages of Discord', which applies cyclic theories of civilizational rise and fall to modern America, finding the data interesting but the core theory questionable. Longer summary

Scott reviews Peter Turchin's book 'Ages of Discord', which attempts to apply the demographic-structural theory of civilizational cycles to modern America. The book presents data showing cyclic patterns in various societal indicators over the past 200+ years, including two main cycles: a long 150-year cycle of national growth and decline, and a shorter 40-60 year cycle of instability. Scott examines the data, theory, and potential problems with applying this pre-industrial model to a modern economy. While finding the data interesting, he is skeptical of some of the theoretical explanations and notes several issues with the arguments. He concludes that while the book provides some valuable concepts and historical information, its core cyclical theory remains questionable. Shorter summary