inferior race which they conquered, the Aryans would never have been in a position to take the first steps on the road which led them to a later type of culture; just as, without the help of certain suitable animals which they were able to tame, they would never have come to the invention of mechanical power which has subsequently enabled them to do without these beasts. The phrase, 'The Moor has accomplished his function, so let him now depart', has, unfortunately, a profound application. For thousands of years the horse has been the faithful servant of man and has helped him to lay the foundations of human progress, but now motor power has dispensed with the use of the horse. In a few years to come the use of the horse will cease entirely; and yet without its collaboration man could scarcely have come to the stage of