nearly the same conclusion. He writes:

'The main factors in producing scientific and other forms of
intellectual performance seem to be density of population,
institutions and social traditions and ideals. All these may be
ultimately due to race, but, given the existing race, the
scientific productivity of the nation can be increased in
quantity, though not in quality, almost to the extent that we
wish to increase it.'[4]

[4] "American Men of Science," Second edition, p. 654.



It is interesting to note that nearly all of the women of
talent have been born in cities and chateaux. This means that
women had to be born where the means of development were to be
had, as they were not free to move about in society, as were
men.



Periods Rich Poor
1300-1500 24 1
1500-1550 39 4
1551-1600 42 --
1601-1650 84 5
1651-1700 73 4
1701-1725 36 3
1726-1750 53 7