It is a myth - credulously parroted in hundreds of publications - that Richard Dawkins coined both the concept and term "selfish gene". The fully evidenced mythbust is here: https://archive.li/CvdUy
Whilst he has, to his credit, admitted that the concept of the selfish gene was William Hamilton's, he has never - to my knowledge - not ever admitted that the all the books, journals, websites etc are wrong to claim he coined the term. Since the term is the concept, that is why so many expert scientists have been confused by this and written that Dawkins coined both the term and concept.
Charles Darwin did the exact same thing with Patrick Matthew's original discovery and prior publication of the full theory of macroevolution by natural selection Matthew coined the term for his theory: 'natural process of selection' Darwin shuffled those same four words into their only grammatically correct equivalent; "process of natural selection." And, just as in the Dawkins case, thousands of scientists now write that Darwin discovered the theory. Read 'Nullius in Verba: Darwin's greatest secret' for the full story of Darwin's newly proven plagiarism by glory stealing lies and for more on Richard Dawkins effectively insisting that the (now newly discovered in print) history of repression of Matthew's ideas - due to their heresy and sedition - should be ignored and that Matthew never understood what he discovered or else he would surely have "trumpeted it from the rooftops".