Panda:
Would this correlate to the physical selfish gene?
Exactly. In fact, it was in Dawkin's book that the idea first appeared. Memes are self-replicating entities that travel from mind to mind. It was little more than an afterthought in Dawkins' book but has since spread rapidly and been the subject of many books. Susan Blackmore's The Meme Machine provides good coverage of the subject and its implications.