There is no simple explanation for why the Early 20th Century was so catastrophic for the World System: World War I (WWI), the Great Depression (GD) and World War II (WWII), all in a row, all followed by a series of minor wars, crises and unresolved problems until the Present.
Imagine that you were British inventor, physicist and engineer Archibald Montgomery Low (1888-1956) and you had heard about George Vacher de Lapoguepredictions about growth and catastrophe in the 20th Century, but you found them a little wacky.** So you produced the graphic above (based on mental models, mathematical equations and speculation) predicting the path of British Development for the first half of the 20th Century to check de Lapoque's predictions. Each Attractor Path was based on a different Geopolitical Alignment:
Historiography of the causes of World War I Historians writing about the origins of World War I have differed over the relative emphasis they place upon the factors involved. Changes in historical arguments over time are in part related to the delayed availability of classified historical archives.
Schroeder, Paul W. Stealing Horses to Great Applause: The Origins of the First World War Reconsidered (2025), influential essays by a leading historian
Timeline of the Great DepressionThe initial economic collapse which resulted in the Great Depression can be divided into two parts: 1929 to mid-1931, and then mid-1931 to 1933. The initial decline lasted from mid-1929 to mid-1931.
Three component state variables of the UKL19 Model explain 100% of the Variation in the indicators: UK1 = (Overall Growth), UK2 = (XREAL+X-L-HOURS-U) Export-Employment Controller and UK3 = (X-XREAL-Q-N) Malthusian Export-Price Controller.
UKL19 Time Plot
Overall growth in the UKL19 model continued through the Nineteenth Century and may or may not have been approaching a steady state around 1900. The Export-Employment and Malthusian Export-Price Controllers hit a minimum just before 1860 (see the Boiler Plate for a discussion of Historical Growth Controllers).
The possible victory of Germany in World War II (WWII) is the standard counterfactual for the Long Nineteenth Century (see the Notes below and the video above). Although interesting, I'm not sure it's the bestcounterfactual, at least from the standpoint of World-Systems Theory (WST).
From the WST perspective a more interesting counterfactual is "What If WWI, the Great Depression and WWII had never happened". What would the history of Long Twentieth Century have been?
If we have systems models of the major countries in both the 19th and 20th Centuries, we can forecast the 19th Century models into the 20th Century to create an alternative history where WWI, the Great Depression and WWII never happened. When then compare the actual paths of the comparable 20th Century models to see what was actually different.
One possible problem is that the data for the 19th Century, the War and Inter-War Periods are not great for most countries in the World-System. However, what we can do is focus on the estimated Systems Models which do show variability across the major countries over the time period (0-2000+, see examples here).
In future posts, I will start with the World System (WL19 and WE20) and then go on to the other major countries in the Long Nineteenth and Twentieth Centuries (Germany, the UK, France, the US, Italy, Japan, Russia, etc.).
I have already started with some countries, for example France as an example (here). From the FRL19 model, it turns out that the Great Depression and possibly the collapse during WWI can be predicted in France from 19th Century data. The same is not the case for the DEL19D Model (Pasdirtz, 1981).
Historiography of the causes of World War I Historians writing about the origins of World War I have differed over the relative emphasis they place upon the factors involved. Changes in historical arguments over time are in part related to the delayed availability of classified historical archives.
Schroeder, Paul W. Stealing Horses to Great Applause: The Origins of the First World War Reconsidered (2025), influential essays by a leading historian
Timeline of the Great DepressionThe initial economic collapse which resulted in the Great Depression can be divided into two parts: 1929 to mid-1931, and then mid-1931 to 1933. The initial decline lasted from mid-1929 to mid-1931.