content: ----------- -----------1) The mechanism of natural selection among people explained:"the races or species of men, whichever term may be applied, encroach on and replace one another, so that some finally become extinct"2) The way this encroachment until extinction occurs among people:"Extinction follows chiefly from the competition of tribe with tribe,and race with race. (...) when of two adjoining tribes one becomes less numerous and less powerful than the other, the contest is soon settled by war, slaughter, cannibalism, slavery, and absorption."3) The morality of Darwinism:"The highest possible stage in moral culture is when we recognise that we ought to control our thoughts, and "not even in inmost thought to think again the sins that made the past so pleasant to us."1,2,3 those are the main things in the book in my opinion. It fails on standards of systemacy, abstraction, exactitude, verification, logic/reasoning, neutrality and formalising of theory.