If a conservative estimate of the proportion of vice due to low wages of girls would be 10 to 15 per cent, it must not be concluded that this represents all of the baneful moral effect of poverty. Whatever the other non-economic causes of vice, they are aggravated where poverty exists. Not only is this so, but alleged other causes may be partly economic. Bad home conditions are due not only to the lack of moral discipline, but also to the lack of income. The average wage of the adult male wage-earner of that section of the United States lying east of the Rockies and north of Mason and Dixon's line is said to be about $600. Sometimes the wage is as low as $500, and in only a few instances as high as $750.[24] If wage-earning men attempt to support families on these incomes, it means that they are not able to provide adequately for their wives and children. If they do not attempt to do so, it means, taking men as they are, an increase in the army of men who support prostitution. Professor H.R. Seager has said that prostitution in aid of wages is the greatest disgrace of our civilization.[25] An accompanying disgrace lies in the fact that economic conditions and other factors prevent the average male wage-earner in so large a section of our country from fulfilling his desire for marriage and a home of the sort that makes for health and happiness. Besides the low wages of women and men, other economic facts have their bearing upon sexual hygiene and morals. These facts may be grouped under the head of industrial stress and strain which is moral as well as physical. The underpaid factory or store girl is subject to constant fatigue. In the rush season in department stores, girls often depend upon opiates for dulling the nervous strain. No trade is free from its special physical strain. There are, moreover, many morally dangerous trades. Work as chambermaids in hotels is conspicuously perilous for girls. The Chicago Juvenile Protective Association says, "The majority of girls who work in hotels go wrong sooner or later." The modern department stores, which employ the majority of young working-girls, offer temptations. Mrs. Florence Kelley refers to work in these stores as "the most dangerous to morals and health, of all occupations into which children can go."[26] Of course, it may be said that a "good girl" will not go wrong. It may also be said that a good social order will not place even good girls daily under conditions that are liable to bring about a physical or moral breakdown. Closer analysis of human character reveals the fact that physical and moral health are more closely associated than we have hitherto believed them to be.