This treatise attempts to develop a quantitative approach to ethical problems. We believe it will take its place with other sciences: psychophysics, psychometrics, econometrics, sociometrics and axiometrics. Ours is more a work of synthesis than analysis, more empirical than rhetorical, broad rather than narrow. We begin with the simplest taxonomy: 2-taxon, then quantification, relativism, absolutism, freedom and end with discussion and speculations