Gilbert Keith Chesterton,
Eugenics and other Evils — Part 2…
(1922)
“ Or if the neighbour approaches us carrying a large knife dripping with blood, we may be convinced by his story that he killed another neighbour in self-defence, that the quiet gentleman next door was really a homicidal maniac. We shall know that homicidal mania is exceptional and that we ourselves are so happy as not to suffer from it, and being free from the disease may be free from the danger. ”
