This originated from Dawkins (The Selfish Gene) but, IIRC, is more of "evolution can be understood in terms of the gene". And there are criticisms of that, like

This originated from Dawkins (The Selfish Gene) but, IIRC, is more of "evolution can be understood in terms of the gene". And there are criticisms of that, like that it doesn't take in to account phenotypes. But, populations evolve, not individuals, yes.