Answer: The Great Depression
Step-by-step explanation:
The Great Depression occured due to the fact that there was a crash of the stock market and this affected the economy of the world. The United States and European countries were majorly hit hard as there was drastic reduction in the demand of goods and services.
The Great Depression led to the government looking for new ways to tackle the challenges and one of those policies was moving towards a mixed economy which is an economy whereby the Individuals and governments are all involved in goods and services production and distribution.