In the second decade of the twentieth century, an idea became all too fashionable among those who feel it is their right to set social trends. Wealthy families took it on as a pet cause, generously bankrolling its research. The New York Times praised it as a wonderful "new science." Scientists, such as the brilliant plant biologist, Luther Burbank, praised it unashamedly. Educators as prominent as Charles Elliot, President of Harvard University, promoted it as a solution to social ills.
That idea was eugenics and in the English-speaking world it had virtually no critics among the "chattering classes." When he wrote this book, Chesterton stood virtually alone against the intellectual world of his day. Yet to his eternal credit, he showed no sign of being intimidated by the prestige of his foes. On the contrary, he thunders against eugenics, ranking it one of the great evils of modern society.