Theodosius Dobzhansky said this quote

“ 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. ”

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Nothing in biology makes sense except in the light of evolution.

~ Theodosius Dobzhansky

Theodosius Dobzhansky Biology Evidence Evolution Natural Selection Science Sense

Seen in the light of evolution, biology is, perhaps, intellectually the most satisfying and inspiring science. Without that light it becomes a pile of sundry facts -- some of them interesting or curious but making no meaningful picture as a whole.

~ Theodosius Dobzhansky

Theodosius Dobzhansky Biology Evolution Inspiring Science

Nature's stern discipline enjoins mutual help at least as often as warfare. The fittest may also be the gentlest.

~ Theodosius Dobzhansky

Theodosius Dobzhansky Altruism Biology Evolution Genes Gentleness Human Evolution Natural Selection Science Survival Survival Of The Fittest

No evidence is powerful enough to force acceptance of a conclusion that is emotionally distasteful.

~ Theodosius Dobzhansky

Theodosius Dobzhansky Illogical Irrationality Stupidity Unscientific Wishful Thinking