English papers are too long and difficult, so I can only give you an abstract, causative doctrine as one of the core theories and principles in Anglo-American contract law. It is a generalization after the establishment of classical contract theory. In order to clarify the meaning of consideration, there are two classic theoretical models: the benefit-damage theory in Britain and the bargaining theory in the United States later. The development of the principle of consideration, especially the generation, evolution, connection, significance and composition of consideration.

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