Many normative theorists have advocated constructivism as a way of overcoming skepticism and nihilism. They have produced three types of constructivism that correspond to three conceptions of rationality: formal (Hare and Gewirth), instrumental (Gauthier), and ideal (Rawls). In this book, T.K. Seung examines these three types and vindicates Rawls' claim that only the constructivism of ideal rationality - which accepts Kantiam ideals as its basis -...