Applied Eugenics

Renew：Part 43
Author：Roswell H. Johnson and Paul Popenoe
Update：08-15-2023
Tags：Politics Social Science
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Chapter List

Chapter II.
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter I, but it seemed worth while to take time to present the fact in a more concrete form as the result of actual measurements. The evidence allows no doubt about the existence of considerable mental and physical differences between men.
Chapter I) of "identical"
Chapter III) that some of them are feeble-minded, some are precocious or highly intelligent; and that there is every possible degree of intelligence between the two extremes. If a great number of children, all 10 years old, were tested for intelligence, it would reveal a few absolute idiots whose intelligence was no more than that of the ordinary infant, a few more who were as bright as the ordinary kindergarten child, and so up to the great bulk of normal 10-year-olds, and farther to a few prize eugenic specimens who had as much intelligence as the average college freshman. In other words, this trait of general intelligence would be found distributed through the population in accordance with that same curve of chance, which was discussed and ill.u.s.trated when we were talking about the differences between individuals.
Chapter 10
Chapter XI. a.s.sortative mating is a well-established fact, and there is every reason to believe that much of the resemblance between husband and wife as regards tuberculosis is due to this fact, and not to infection.[59]
Chapter XI; here it may be pointed out that the number who fail to marry is very much greater than one often realizes. It has already been noted that a large part of the population dies before it reaches the age of marriage. Of 1,000 babies born in the United States, only 750 will reach the average age of marriage; in some countries half of the thousand will have fallen by that time. These dead certainly will leave no descendants; but even of the survivors, part will fail to marry. The returns of the thirteenth U. S. census showed that of the males 45-64 years of age, 10% were single, while 11% of the females, 35-44 years old, were single. Few marriages will take place after those ages. Add the number who died unmarried previous to those ages, but after the age of 20, and it is safe to say that at least one-third of the persons born in the United States die (early or late) without having married.
Chapter 13
Chapter I for believing that the problem can not be solved in that way, and more evidence to the same effect will be present in other chapters of the book.
Chapter 15
Chapter 16
Chapter 17
Chapter 18
Chapter 19
Chapter 20
Chapter 21
Chapter 22
Chapter 23
Chapter 24
Chapter 25
Chapter 26
Chapter 27
Chapter 28
Chapter 29
Chapter 30
Chapter 31
Chapter 32
Chapter 33
Chapter IV that inheritance often seems to be highly specialized,--a fact which leads to the inference that the son might often do best in his father"s calling or vocation, especially if his mother comes from a family marked by similar capacities. It is difficult to say how far the occupation of the son is, in modern conditions, determined by heredity and how far it is the result of chance, or the need of taking the first job open, the lack of any special qualifications for any particular work, or some similar environmental influence. Miss Perrin investigated 1,550 pairs of fathers and sons in the English _Dictionary of National Biography_ and an equal number in the English _Who"s Who_. "It seems clear," she concluded, "that whether we take the present or the long period of the past embraced by the Dictionary, the environmental influences which induce a man in this country to follow his father"s occupation must have remained very steady." She found the coefficient of contingency[180] between occupation of father and occupation of son in _Who"s Who_ to be .75 and in the _Dictionary of National Biography_ .76. For the inheritance of physical and mental characters, in general, the coefficient would be about .5. She thinks, "therefore, we may say that in the choice of a profession inherited taste counts for about 2/3 and environmental conditions for about 1/3."
Chapter 35
Chapter II that the attempt to ban alcoholic beverages on the ground of direct dysgenic effect is based on dubious evidence.
Chapter 37
Chapter 38
Chapter 39
Chapter V, this hypothesis carries the a.s.sumption that every visible character is due to the effects of not one but many factors in the germ-cell.
Chapter 41
Chapter 42
Chapter 43