Adam Smith- Smith is known as the father of modern economics and is still among the most influential thinkers in the field of economics today.
Milton Friedman- an American economist, statistician, and writer who taught at the University of Chicago for more than three decades. He was a recipient of the 1976 Nobel Prize in Economic Sciences, and is known for his research on consumption analysis, monetary history and theory, and the complexity of stabilization policy.
Friedrich Hayek- Hayek was a major social theorist and political philosopher of the twentieth century, and his account of how changing prices communicate information which enables individuals to co-ordinate their plans is widely regarded as an important achievement in economic.
John Maynard Keynes- 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.