Quite apart from any deeper and more difficult reforms, such as Dr. Wallace alludes to, I am sure that even the mere widening of the field of choice, as such, is most desirable. To take an instance, which the reader may very likely think trivial and absurd, I have witnessed in my brief career as a hockey player two unions most happy and eugenic in every way, which entirely depended upon the existence of the amusement called mixed hockey--whereat the contracting parties met one another! It is not asserted that these two cases suffice for world-wide generalisation. They are merely cited as instances which set at least one hockey player thinking, even on the field--the field of choice. It is a great argument, because it is a eugenic argument, in favour of community of sports and amusements amongst young people of both sexes, that it does widen the field of choice in marriage, and that in doing so it also tends to favour those factors of selection which the eugenist would desire to see selected: and this especially as compared with the ball-room. I think that the reader will agree that the conditions, the “atmosphere,” the costume, and the other features of what young people call a “dance,” whilst undoubtedly serving the purpose of marriage and widening somewhat a field of choice which might otherwise be ludicrously and impracticably restricted, compare most unfavourably with the conditions of even the mixed hockey field, which, decried though they often be, are to my mind immeasurably healthier on every conceivable ground than those of the ball-room, and not least of all on the eugenic ground of the prominence gained by most desirable qualities, of which mere strength and energy and neuro-muscular skill are quite the least, whilst unselfishness, capacity for self-control, patience, real gallantry--as when a male “full back” refrains from hitting the ball with all his might against the toes of a girl “forward”--the sporting spirit and other true and radical virtues, are the greatest. It is undoubtedly the case that the personal factors, physical and psychical, which determine the mutual attraction of young people, have dependent upon them the whole of human destiny. In society to-day, what one may call the incidence of parenthood, upon which all the future necessarily depends, _is_ determined by nothing other than the humanised form of what Darwin called “sexual selection.” Therefore, it is not trivial but supremely important to discuss the conditions under which the selection obtains.[53] It has already been suggested that in order to enhance the eugenic value of marriage we should endeavour to widen the field of choice, at present ludicrously restricted by custom, class, religion, economic position, and so forth. The increased locomotion of to-day will be of real eugenic service to the race in this respect, I believe.