"Man is an organized being, and is subject to certain laws which he cannot violate with impunity. These laws affect him in the air he breathes, the food he eats, the clothes he wears, and (in) every circumstance surrounding his habilitation. In the wholesale violation of these laws after the war, as previously stated, was laid the foundation of the degeneration of the physical and mental condition of the Negro. Licentiousness left its slimy trail of sometimes ineradicable disease upon his physical being, and neglected bronchitis, pneumonia, and pleurisy lent their helping hand toward lung degeneration."[33] It will be noticed that Dr. Miller accepts all the facts alleged by our author, but places the causes squarely upon the ground of conditions, habits and circumstances of life. He does not seem to be acquainted with Mr. Hoffman's discovery of "race traits." The fact that under the hygienic and dietary regime of slavery, consumption was comparatively unknown among Negroes, but that under the altered conditions of emancipation it has developed to a threatening degree, would persuade any except the man with a theory, that the cause is due to the radical changes in life which freedom imposed upon the blacks, rather than to some malignant, capricious "race trait" which is not amenable to the law of cause and effect, but which graciously suspended its operation for two hundred years, and has now mysteriously selected the closing decades of the nineteenth century in which to make a trial of its direful power. No people who work all day in the open air of a mild climate and who sleep at night in huts and cabins where crack and crevice and skylight admit abundant ventilation, will be subject to pulmonary weakness. Now take the same people and transplant them to the large cities of a colder climate, subject them to pursuits which do not call for a high degree of bodily energy, crowd them into alley tenements where the windows are used only for ornament and to keep out the "night air," and a single door must serve for entrance, exit, and ventilation, and lung degeneration is the inevitable result. The cause of the evil suggests the remedy. The author in a previous chapter points out the threatening evil of crowding into the cities; a counter movement which would cause a return to the country, or would at least stay the mad urban movement, would not only improve the economic status of the race but would also benefit its physical and moral health. Here is an open field for practical philanthropy and wise Negro leadership.