John Maynard Keynes, 1st Baron Keynes ( KAYNZ; 5 June 1883 – 21 April 1946), was a British economist, whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments. Originally trained in mathematics, he built on and greatly refined earlier work on the causes of business cycles, and was one of the most influential economists of the 20th century. Widely considered the founder of modern macroeconomics, his ideas are the basis for the school of thought known as Keynesian economics, and its various offshoots.During the Great Depression of the 1930s, Keynes spearheaded a revolution in economic thinking, challenging the ideas of neoclassical economics that held that free markets would, in the short to medium term, automatically provide full employment, as long as workers were flexible in their wage demands. He argued that aggregate demand (total spending in the economy) determined the overall level of economic activity, and that inadequate aggregate demand could lead to prolonged periods of high unemployment. Keynes advocated the use of fiscal and monetary policies to mitigate the adverse effects of economic recessions and depressions. He detailed these ideas in his magnum opus, The General Theory of Employment, Interest and Money, published in 1936. By the late 1930s, leading Western economies had begun adopting Keynes's policy recommendations. Almost all capitalist governments had done so by the end of the two decades following Keynes's death in 1946. As a leader of the British delegation, Keynes participated in the design of the international economic institutions established after the end of World War II but was overruled by the American delegation on several aspects.
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Wildness and silence disappeared from the countryside, sweetness fell from the air, not because anyone wished them to vanish or fall but because throughways had to floor the meadows with cement to carry the automobiles which advancing technology produced. . . . Tropical beaches turned into high-priced slums where thousand-room hotels elbowed each other for glimpses of once-famous surf not because those who loved the beaches wanted them there but because enormous jets could bring a million tourists every year — and therefore did.