IV.--But it will be said 'You have not yet touched upon a big central contradiction between religion and science. According to the Christian doctrine mankind is derived from a single specifically human pair, made human by a special inspiration of the Divine Spirit. According to the theory of evolution, a certain species of apes under specially favourable conditions gradually advanced to become what might be called man, though of a very low type.' To this I am inclined to make reply thus: Christianity is really bound up with maintaining four positions--(1) the reality of moral freedom; (2) the fact of sin, properly so called as distinct from imperfection; (3) its practical universality, at least as an inherited tendency; and (4) the unity of the human race in such {229} sense that the same postulates may be made with regard to all men, and the same capacity for moral redemption (more or less) assumed to be in them. Now, as regards the first three of these positions enough has been said already, and the last of them does not appear to be at present in dispute between science and religion. St. Paul says, 'God made of one' (or 'of one blood,' for this reading is possibly right) 'every nation of men' (Acts xvii. 26). And of one blood, if not of one individual, all men are, according to the present conclusions of biological science. A recent work on ethnology, by Mr. Keane (Cambridge Geographical Series), speaks thus:--'The hominidae are not separately evolved in an absolute sense--i.e. from so many different anthropoid precursors, but the present primary divisions are separately evolved from so many different pleistocene precursors, themselves evolved through a single pliocene prototype from a single anthropoid precursor[12].'