[lemma=new] [□=□] □
[lemma=new] [word=□] □
[lemma=new] [tag=□] □
Mental corruption occurs as man becomes subject to a new system of needs and to the operation of amour propre . THE progress made by the natural sciences in the nineteenth century awakened in modern thinkers the desire to work out a new system of ethics on positive bases . Such is the solid foundation which science gives us for the elaboration of a new system of ethics and its justification ; and , therefore , instead of proclaiming " the bankruptcy of science , " what we have now to do is to examine how scientific ethics can be built from the materials which modern research , stimulated by the idea of evolution , has accumulated for that purpose .