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.Charles Darwin
In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.Charles Darwin
The affinities of all the beings of the same class have sometimes been represented by a great tree...Charles Darwin
From so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.Charles Darwin
It may be said that natural selection is daily and hourly scrutinizing, throughout the world, every variation, even the slightest...Charles Darwin
A grain in the balance will determine which individual shall live and which shall die...Charles Darwin
The very first place which I examined... showed me clearly the wonderful superiority of the theory of natural selection...Charles Darwin
Whilst man keeps on selecting and thus adding to his standard, the unimproved parent- stock must decrease in number and disappear...Charles Darwin
The few hereditary modifications, for instance, the hide of the boar compared to that of the domestic pig...Charles Darwin
I have seen with my own eyes that all domesticated birds lay a much heavier body of egg than do their wild congeners...Charles Darwin