"3. They are a source of physical decay and moral contamination, and thus menace the integrity of the entire social fabric."[77] Society has long since admitted that it is desirable to restrict the reproduction of certain classes of gross defectives, and criminals, by the method of segregation. The ground for this is sometimes biological, perhaps more often legal, as in the case of the insane and criminal, where it is held that the individual is legally incapacitated from entering into a contract, such as that of marriage. It would be better to have the biological basis of restriction on marriage and reproduction recognized in every case; but even with the present point of view the desired end may be reached. From an ethical standpoint, so few people would now contend that two feeble-minded or epileptic persons have any "right" to marry and perpetuate their kind, that it is hardly worth while to argue the point. We believe that the same logic would permit two individuals to marry, but deny them the privilege of having children. The reasons for this may be considered under three heads. 1. Biological. Are there cases in which persons may properly marry but may properly be prevented by society from having any offspring, on the ground that such offspring would be undesirable components of the race? The right of marriage is commonly, and may well be properly, regarded as an inalienable right of the individual, in so far as it does not conflict with the interests of the race. The companionship of two persons between whom true love exists, is beyond all question the highest happiness possible, and one which society should desire and strive to give its every member. On that point there will be no difference of opinion, but when it is asked whether there can be a separation between the comradeship aspect and the reproduction aspect, in marriage, whether any interest of the race can justifiably divorce these two phases, often considered inseparable, protests are at once aroused. In these protests, there is some justice. We would be the last ones to deny that a marriage has failed to achieve its goal, has failed to realize for its participants the greatest possible happiness, unless it has resulted in sound offspring.