The term "meme" was coined by biologist Richard Dawkins in his 1976 book The Selfish Gene,[1] to illustrate the principle that he later called "Universal Darwinism".

He gave as examples, tunes, catchphrases, fashions, and technologies. Like genes, memes are selfish replicators and have causal efficacy; in other words, their properties influence their chances of being copied and passed on.

Just as genes can work together to form co-adapted gene complexes, so groups of memes acting together form co-adapted meme complexes or memeplexes.

Criticisms of memetics include claims that memes do not exist, that the analogy with genes is false, that the units cannot be specified, that culture does not evolve through imitation, and that the sources of variation are intelligently designed rather than random.

David Foster Wallace once said that:The language of images. . . maybe not threatens, but completely changes actual lived life. When you consider that my grandparents, by the time they got married and kissed, I think they had probably seen maybe a hundred kisses. They'd seen people kiss a hundred times. My parents, who grew up with mainstream Hollywood cinema, had seen thousands of kisses by the time they ever kissed. Before I kissed anyone I had seen tens of thousands of kisses. I know that the first time I kissed much of my thought was, “Am I doing it right? Am I doing it according to how I've seen it?”

A lot of the 80s and 90s critiques of postmodernity did have a point—our experience really is colored by media. Having seen a hundred movies about nuclear apocalypse, the entire time we’ll be looking over our shoulder for the camera, thinking: “Am I doing it right?”