This consideration--strictly scientific as it is--ought to have very great weight in that new department of biological work which has been named Eugenics. Before lightly saying of any stock that it is not good to breed from, or that it is good to breed from, pains should surely be taken to ascertain whether irregularities and disease evinced by members of that stock do not in reality proceed from their superiority to their environment and to the average men and women about them. Individually they may be irreclaimable, yet, thrown out of gear, miserable and wasted as they are, they may be the carriers of the finest hopes of humanity, of a promise for the fulfilment of which we are not yet ready. Perhaps there is a tendency to be a little over-hasty in our estimates of good and bad stocks to breed from. Perhaps we have not yet fully learnt either the significance of recessive characters or the importance of the mere fact that the unit-characters of a human being are immensely numerous, and their inter-relations therefore extremely intricate. And yet, again, perhaps we are too intolerant of variety, too eager for uniformity. Here in England we have a mixed population, sprung from many diverse origins. The differences between individuals are many and great. Yet the majority of the population is thrust into the grooves of one educational system, and thereafter compelled to settle down to occupations and modes of life which are the same for thousands together. Any attempt to leave the common rut is looked at askance. What wonder that there are rebels, and that the rebels are unhappy! A society constructed in conformity to true biological principles, instead of suppressing variety would give it welcome as one of the most precious of national characteristics, and would purposely adjust itself and its systems with more accuracy so as to give every sort and type of person the best possible chance for developing his or her peculiar gifts. In a society so constituted, very rare indeed would be the occurrence of insanity. These considerations should have weight in yet another direction: in determining the counsel which ought to be given to girls as to the choice of a mate. The importance of soundness of stock has here too been well brought into prominence by the workers in Eugenics; and perhaps it may not be amiss to make one or two suggestions with a view to obviating a too narrow application of the principle of the sound stock.