Very much 'the economists' economist', Samuelson published rigorous statements of fundamental concepts and theories in just about every branch of economics, including international trade, consumer theory and welfare economics, production theory, financial analysis, growth theory, macroeconomics, and the history of economic thought. Samuelson is a key figure in economic thinking and there are few graduate students of economics who have not read and re-read his classical essays. This collection gathers the essential assessments of this important economist, and provides an unparalleled insight into his lasting impact on economics throughout the last century to the present day.