Great Britain, France, Russia, Belgium, and Germany saw the largest economic impacts of WWI. Nations were forced into a war of attrition. The new fighting style and weaponry of WWI caused extensive damage, more than any previous European war. 

The expensive nature of the war forced nations into debt. The United States offered loans to its European allies during the war, expecting them to be paid afterwards. The Treaty of Versailles placed war reparations on Germany totaling 132 billion German marks (around $33 billion). This, coupled with their personal war debts, forced Germany into a period of hyperinflation when they were forced to print more money to cover their debts.

The US, under the direction of Charles Dawes, developed a plan in which the US would loan Germany money to pay off its debts. In return, the other European nations could pay off their debts to the US. 

Dawes Plan. Photo courtesy of SlidePlayer.

US Stock Market Crash

In the United States, WWI had been an economic boom. Industry was more productive and the workforce had expanded in the wartime economy. This led to the outbreak of a consumer economy in the 1920s. Part of this consumer economy led to people investing in the stock market with expectations of making money. However, they didn’t invest the full amount required.

Most were buying on the margin: meaning they were only paying 10-20% of their investment and taking a loan out for the rest. When stock prices reached a peak, many began selling their stocks. As the DOW dropped after one day, a frenzy began and people started selling stocks quickly. The problem? People had only invested 10-20% of the cost. If they don’t make money, they can’t pay their loans back.

When banks began closing and the US Stock Market crashed in 1929, the US was unable to continue participating in the Dawes Plan and the Great Depression began, then exacerbated the hyperinflation already occurring in Europe.

Rise of Extremism

The extreme poverty that existed in Europe led to the rise of authoritarian leaders. People feared for their lives, their futures, and the futures of their nations. Men who had military backgrounds made strong speeches with rhetoric that matched the anger and frustrations of their populations, and promised to fix all that is wrong with their countries. They start gaining popularity in Italy, Spain, Germany, and even Russia. It is important to recognize that European Nations began to become very dependent on the U.S economy after WWI, so the nationalist rhetoric opposed this interconnectedness and preached self-sufficiency in the economy.

New Economic Theories

In order to revert this deep economic crisis, different economic ideologies began to gain popularity across the world. These new theories were often built as an alternative option to classical economics, and set the groundwork for heterodox economists.

• Keynesianism - Deveoped by the British economist John Maynard Keynes, it consists of the idea that government intervention is important to maintain economic stability. Keynes emphasized the need to have a comprehensive fiscal set of policies that use government spending to expand the economy. His ideas highly influenced JFK in the United States to recover the US economy.

• Cooperative Social action in Scandinavia - This set of policies emerged during the depression period in the Scandinavian countries, such as Denmark, Finland and Iceland. It consisted of cooperation between the government, employers and workers in achieving economic and social equality. This model has been praised for overcoming poverty and inequality and allowing for economic mobility (the capacity of citizens to ascend the social strata).

• Popular Front policies in France - The popular front of France is a coalition of French left-wing political parties led by the PCF, the French Communist Party. Their economic policies aimed to reduce poverty and promote more equality through the nationalization of certain industries, the implementation of 40-hour workweeks and other social welfare programs.

All of these theories are a direct response to the tragic outcomes of war, and many of these policies endured until the late 20th Century.