When did Keynesian economic ideas lead to a revolution in thinking about the role of the government in the economy?

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Keynesian economic ideas gained prominence in the 1930s during the Great Depression, leading to a revolution in thinking about the role of the government in the economy. Keynes argued that government intervention was necessary to stimulate demand during times of economic downturn and promote economic growth, which became a fundamental principle of modern macroeconomic policy.

When Did Keynesian Economic Ideas Lead to a Revolution in Thinking