This is an intelligent and inspired proposal for the development of a planetary ethics based on universal human rights and scientific wisdom. In a work that blends realism and optimism, philosopher Paul Kurtz (1925-2012) lays out the basic principles of an ethical approach that he calls humanist eupraxsophy - that is, the application of practical moral choices inspired by scientific wisdom. Citing the emergence of a planetary ethics based on universal human rights, free scientific inquiry unfettered by dogma, an attitude of exuberance toward human potentials, and courage and determination in the face of the daunting challenges of our time. Kurtz concludes on an enthusiastic note: there is meaning to be found in creative human endeavours as well as a sense of awe and profound reverence inspired by the spectacle of the enormous universe and the prospects for the human adventure.