essay led Darwin and Wallace to enunciate the theory
of natural selection, and to point out clearly the effects of artificial
selection. It is really on Darwin's work that the modern science of
eugenics is based, and it owes its beginning to Darwin's cousin, Francis
Galton.

Galton was born in 1822, studied mathematics and medicine, traveled
widely, attained fame as an explorer in South Africa, and after
inheriting sufficient income to make him independent, settled down in
London and gave his time to pioneering experiments in many branches of
science. He contributed largely to founding the science of meteorology,
opened new paths in experimental psychology, introduced the system of
finger prints to anthropology, and took up the study of heredity,
publishing in 1865 a series of articles under the title of "Hereditary
Talent and Genius," which contained his first utterances on eugenics.

The present generation can hardly understand what a new field Galton
broke. Even Darwin had supposed that men do not differ very much in
intellectual endowment, and that their differences in achievement are
principally the result of differences in zeal and industry. Galton's
articles, whose thesis was that better men could be bred by conscious
selection, attracted much attention from the scientific world and were
expanded in 1869 in his book _Hereditary Genius_.

This was an elaborate and painstaking study of the biographies of 977
men who would rank, according to Galton's estimate, as about 1 to 4,000
of the general population, in respect to achievement. The number of
families found to contain more than one eminent man was 300, divided as
follows: Judges, 85; Statesmen, 39; Commanders, 27; Literary, 33;
Scientific, 43; Poets, 20; Artists, 28; Divines, 25. The close groupings
of the interrelated eminence led to the conclusion that heredity plays a
very important part in achievement. The greater success of real sons of
great men as compared with adopted sons of great men likewise indicated,
he thought, that success is due to actual biological heredity rather
than to the good opportunities afforded the scion of the illustrious
family. Galton's conclusion was that by selecting from strains that
produced eminence, a superior human stock could be bred.

In 1874 he published a similar study of the heredity of 180 eminent
English scientists, reemphasizing the claims of nature over nurture, to
use his familiar antithesis. In 1883 he published