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出版Collector's Library of Essential Thinkers, 2004
主題Philosophy / General
ISBN19049194059781904919407
URLhttp://books.google.com.hk/books?id=hdB3AAAACAAJ&hl=&source=gbs_api
註釋Contributed three new ideas to the development of philosophy: that goodness consists not in helping friends and harming enemies, but in not harming anybody at all; that goodness and knowledge are one and the same thing; and that for progress to be made in argument, there must be step-by-step agreement between those arguing.