Who is known as the founding father of macroeconomics as a separate discipline?

John Maynard Keynes is often regarded as the founding father of macroeconomics as a separate discipline. His work, particularly in his book “The General Theory of Employment, Interest and Money” published in 1936, revolutionized economic theory and policy, focusing on aggregate demand and the role of government intervention in managing economic fluctuations. Keynesian economics became a dominant framework in macroeconomic analysis and policy during the 20th century.