Complex sentence: Richard Dawkins' 1976 book The Selfish Gene proposed the meme, analogous to a gene, which is an idea-replicator that which can reproduce itself, by jumping from mind to mind via the process of one human learning from another via imitation.
Split into simpler sentences: Richard Dawkins' 1976 book The Selfish Gene proposed the concept of the "meme", which is analogous to that of the gene. A meme is an idea-replicator that which can reproduce itself, by jumping from mind to mind via the process of one human learning from another via imitation.