This volume incorporates important surveys from a historical perspective. The masterly survey of Bhagwati provides great intuition about trade theoretical results and Chipman's three surveys present the mathematics of trade theory. These are very deep surveys from a mathematical point of view and show, for example, the Ricardian model as an application of Quasi-Concave programming and also the magnificent use of Sperner's Lemma for the odd and even intersections that occur in some problems in trade theory. There are also other surveys bringing the literature up to date and covering specific topics in trade theory.