Each individual plant in the struggle for life has only itself to maintain. In the higher forms of animal life, each animal has its offspring as well as itself to maintain. In a state of nature, that is in a state unaffected by man's rational interference, defective offspring and weaker brethren were the victims of the inexorable law of natural selection. When Christ gave _his_ reply to the question, "Am I my brother's keeper?" the defective and the weakling became the special care of their stronger brother. They constituted thenceforth The Fit Man's Burden. The work a man has to do during life, in order to support himself, is the unit of measurement of the burden he has to bear. Many factors in modern times have helped to reduce that work to a minimum. The invention of machinery has multiplied his eyes, his hands, his feet; and one man can now produce, for his own maintenance and comfort, what it took perhaps a score of men to produce even a century ago. Man's disabilities from incidental and epidemic disease have been immeasurably reduced by modern sanitation, and the teaching and practice of preventive medicine. Agricultural chemistry has made the soil more productive, and manufacturing arts have aided distribution as well as production. All the departments of human knowledge have been placed under contribution to man's necessity, and longer life, better health, and more food and clothing for less work, are the blessings on his head to-day. While the burden has been lessened by the industrial and scientific progress of the last half century, it has been augmented by the fertility of the unfit; and the maintenance in idleness and comfort of the great and increasing army of defectives constitutes the fit man's burden. The unfit in the State include all those mental and moral and physical defectives who are unable or unwilling to support themselves according to the recognised laws of human society. They include the criminal, the pauper, the idiot and imbecile, the lunatic, the drunkard, the deformed, and the diseased. We are now face to face with the startling fact that this army of defectives is increasing in numbers and relative fertility.