The evolution of life, and the evolutionary origin of mankind, are scientifically established as firmly and completely as any historical event not witnessed by human observers. Any concession to anti-evolutionists, suggesting that there are scientific reasons to doubt the facticity of evolution, would be propagating a plain untruth.
In a letter to J. Kunamoto, 1972.
The living world is not a single array . . . connected by unbroken series of intergrades.Theodosius Dobzhansky
The greatest evolutionist of our century.Theodosius Dobzhansky