“The relation between humanity and its environment is very close. Strong-willed, intelligent people may create or modify environment. The weaker-willed, the careless, and the unreflecting are dominated by environment. Such is a fairly rough estimate of the relation. For all but the exceptionally strong and virile, home environment determines the trend of life. Populous masses herded together, as they are over large areas of the tenement regions of New York City, with difficulty resist the influences by which they are surrounded.”