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Nothing in Biology Makes Sense Except in the Light of Evolution

One of the founders of the modern synthesis of evolutionary theory, Theodosius Dobzhansky provided laboratory evidence for natural selection and variation as the major forces driving evolution. In this essay from American Biology Teacher, March 1973, Dobzhansky shows how evolution is the cornerstone which supports and unifies the many fields within biology. He writes of biology: "without that light [of evolution] it becomes a pile of sundry facts some of them interesting or curious but making no meaningful picture as a whole."

Credits: Reprinted from The American Biology Teacher, March 1973 (35:125-129). Used by permission of National Association of Biology Teachers (

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Why Evolution Matters

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