Famous biologist and radical atheist
Richard Dawkins used the term in his book
The Selfish Gene.
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"Dawkins defined the meme as a unit of cultural transmission, or a unit of imitation and replication, but later definitions would vary. The lack of a consistent, rigorous, and precise understanding of what typically makes up one unit of cultural transmission remains a problem in debates about memetics.[14] In contrast, the concept of genetics gained concrete evidence with the discovery of the biological functions of DNA."