Was a British economist whose ideas have fundamentally affected the theory and practice of modern macroeconomics and informed the economic policies of governments. He built on and greatly refined earlier work on the causes of business cycles, and he is widely considered to be one of the founders of modern macroeconomics and the most influential economist of the 20th century.
Keynesian economics gets its name, theories, and principles from British economist John Maynard Keynes (1883-1946), who is regarded as the founder of modern macroeconomics. His most famous work, The General Theory of Employment, Interest and Money, was published in 1936.
British economist John Maynard Keynes believed that classical economic theory did not provide a way to end depressions. He argued that uncertainty caused individuals and businesses to stop spending and investing, and government must step in and spend money to get the economy back on track.