"It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change."

"At some future period, not very distant as measured by centuries, the civilized races of man will almost certainly exterminate and replace the savage races throughout the world."

"But I am very poorly today and very stupid and hate everybody and everything."

"The astonishment which I felt on first seeing a party of Fuegians on a wild and broken shore will never be forgotten by me, for the reflection at once rushed into my mind—such were our ancestors."

"Man, with all his noble qualities, with sympathy which feels for the most debased, with benevolence which extends not only to other men but to the humblest living creature, with his god-like intellect…"