What is Keynesian economics and who came up with it?

Keynesian economics is a macroeconomic economic theory of total spending in the economy and its effects on output, employment, and inflation. Keynesian economics was developed by the British economist John Maynard Keynes during the 1930s in an attempt to understand the Great Depression.

Explanation:

The government should spend money on jobs, and stimulus, and increasing taxes to reduce inflation.

Explanation:

Came to this conclusion after watching "Keynesian Economics Explained in 60 Seconds" on yt

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d. it was created with the idea that it could be easily revised if it was ineffective