"The subject of the future that lies before humanity may obviously be treated in various ways; perhaps the simplest division which we can make is to speak first of the immediate future, then of the remoter future, then of the final goal. Both the immediate and the remoter future may be to some extent a matter of speculation, or perhaps we should rather say of calculation; but the final goal we know with absolute certainty, and that is the only thing which is really of importance. Still it is well that we should try to look forward a little, so that we who are units in this great mass of humanity may be able to take our part intelligently in the evolution which we see to be progressing all round us."