John Maynard Keynes was the most influential British economist of the 20th century whose ideas fundamentally changed the practice of macroeconomics and the economic policies of the world. He is regarded as the founder of macroeconomics. He introduced Keynesian principles to the world that created a revolution in economic thinking with its unconventional approach. It challenged neoclassical economics and brought to the forefront the importance of state intervention to moderate the economic activity of the country and control the ‘boom’ and ‘bust’ phases. His 1936 book ‘The General Theory of Unemployment, Interest and Money’ was path-breaking in terms of content. Through his book, he argued that full employment could be maintained only with the help of government spending and that it could not always be reached by making wages sufficiently low. He believed that unemployment is basically caused if people don’t spend enough money. Lower spending results in demand falling further and a vicious circle commences which leads to job losses and a further fall in spending. Keynes’ solution to the problem was that governments should borrow money and boost demand by pushing the money into the economy. Once the economy has recovered and is expanding, governments should pay back the loans. Keynes was also responsible for the foundation of the International Monetary Fund (IMF) and World Bank (WB). Till date, he is best remembered as one of the world’s most influential economists of all time.