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In his final work, Murakami confronts three crucial questions: How and in what form can a harmonious and stable post-cold-war world order be created? How can the world maintain the necessary economic performance while minimizing conflicts and environmental deterioration? What must be done to safeguard the freedoms of all peoples?
How is a social decision made out of individual members' decisions? This is one of the primary questions in the social sciences. Logic and Social Choice provides an answer to the topic by the application of mathematical logic. Yasusuke Murakami formulates social decision-making in logical terms, and shows that an analysis of social decision is equivalent to a logical calculus in many-valued logic. The logical conditions are then derived for various types of societies, especially for democracy. This foundation enables the author to discuss such topics as the relation between direct democracy and the representative system, a comparison of various rules of election, and the stability of social decision. The main conclusion is that inconsistency or paradox is inherent not only in voting and in democracy itself, but also in any piecemeal social decision-making.
Nine essays critically evaluate Murakami's sanguine vision for the future which is sustained by "polymorphic liberalism," a new type of liberalism that reflects the needs of both developed and developing economies and the realities of the diversity of cultures.