tion toward, forming refined habits among the rich, will make that frequent exchange between class and class, that promotion and inter-marriage which at present retards the splitting of our species along the lines of social stratification, less and less frequent.
"So, in the end, you would have above ground the Haves, pursuing health, comfort, and beauty, and below ground the Have-nots; the workers, getting continually adapted to their labor. No doubt, once they were below ground, considerable rents would be charged for the ventilation of their caverns. Workers who struck work would starve or be suffocated for arrears of ventilator rent; workers who were so constituted as to be miserable and rebellious would die. In the end, if the balance was held permanent, the survivors would become as well adapted to the conditions of their subterranean life as the overworld
