Thesis (Ph.D)--Boston UniversityThe purpose of this dissertation is to examine several important philosophical problems connected with deriving moral laws from psychological data. Conclusions: 1. The abstraction and inadequacy of non-empirical approaches to real-life moral problems strongly implies an urgent necessity to investigate empirical approaches. 2. Psychological data may be utilized (as specified in 5 and 4, below) for the derivation of moral laws defined as principles of constant, verifiable, genetic relevance between choices and foreseeable consequences in values. 3. The important contributions of psychological data are: (a) broader knowledge of possibilities in mental and physical behavior of persons, which affords rational gro...