Memes — The New Replicators

Core idea

The book has spent ten topics arguing that genes are the central replicator of life on Earth. This topic — the most influential single topic in the book — claims that genes are not the only replicator. Wherever the three replicator properties (longevity, fecundity, fidelity, established in topic 2) hold, evolution will run. Dawkins proposes that human culture meets these conditions and introduces a name for its unit:

Dawkins's definition: A meme is a unit of cultural transmission — a tune, idea, catch-phrase, fashion, way of making pots, way of building arches. Memes propagate from brain to brain by imitation. As they copy, they vary; as they vary, some spread and others die out. The resulting evolutionary dynamic runs in parallel with (and sometimes against) the genetic one.

The word meme was coined for this topic; Dawkins built it from the Greek mimeme (something imitated), abbreviated to rhyme with gene. Half a century later it has been seized by the internet to mean something narrower (a viral image), but the original sense is much broader: any culturally transmitted unit that copies, varies, and is selected.

Why it matters

Two replicator systems running in parallel

The topic's most consequential move is to remove genes from their privileged position as "the" replicator. Genes are one replicator. Memes are another. Both copy themselves through some substrate (DNA for genes, brains and books for memes); both produce variation; both are subject to selection by differential propagation. The two are not equivalent in detail — meme copying is far less accurate than gene copying, meme generation times are much shorter — but the logic is the same.

Once two replicator systems exist in the same biological substrate, they can either align or compete. They often align: a meme for "wash your hands before eating" propagates among genes that survive infection. They sometimes compete: a meme for celibacy (Christian monasticism, Buddhist sanghas) propagates despite its catastrophic genetic cost — the celibate carriers leave no offspring but pass the meme on to recruits.

Why memetics matters for human behavior

The topic is short, but its claim is sweeping. Human behavior cannot be fully explained by genes alone. Humans live in a cultural environment that is itself evolving, by selection pressure on cultural units that act partially independent of genetic interest. A theory of human behavior that ignores meme-level evolution is therefore incomplete — possibly catastrophically so.

This is the topic most often cited by evolutionary psychologists, cultural-evolution theorists, and (notoriously) by Daniel Dennett in Darwin's Dangerous Idea. It is also one of the topics Dawkins is most cautious about in the 40th-anniversary epilogue: memetics has, in his judgment, both succeeded and failed in the half-century since.

The God meme

Dawkins (who in 2006 would write The God Delusion) uses this topic's framework to analyze religion. A religion is a complex of memes — beliefs, rituals, narratives, in-group/out-group markers — that has evolved to propagate from brain to brain. Whether or not religious beliefs are true (and Dawkins thinks they are not), the meme system of religion is highly evolved: it includes self-replicating instructions ("spread the faith"), in-group/out-group sorting, threats against defection (hell), rewards for compliance (heaven, community), inoculation against rival memes (heresy laws), and elaborate rituals that bind the carriers.

The meme system is, in evolutionary terms, exquisitely engineered. It is not engineered for the carriers — it is engineered to propagate, the way a gene is. That is the most uncomfortable consequence of the topic's framing.

Where the meme analogy holds and where it strains

Dawkins is careful about the limits. Memes are not as discretely individuated as genes; cultural units blur into each other. Meme "copying" is much noisier than gene copying — most memes mutate substantially with each transmission. Memes can propagate horizontally (between contemporaries) as well as vertically (between generations), unlike genes. And memes are evaluated by human minds, which themselves have evolved preferences that bias which memes survive.

These differences mean memetics is not a strict science the way population genetics is. But the core logical structure — units that copy, vary, and are selected — is shared. The framework is illuminating even where the analogies break down.

The escape from the genetic tyranny

The topic closes with what is, on its face, an optimistic note. Humans are, uniquely among animals, the species in which the meme system has become rich enough and influential enough to override the gene system. We can decide to use contraception (against our genes' interests). We can adopt children genetically unrelated to us (against our genes' interests). We can devote our lives to the propagation of memes (science, art, religion, ideologies) at gene-level cost. We are, Dawkins says, the only species capable of rebelling against the tyranny of the selfish replicators. The meme is what makes the rebellion possible.

Key takeaways

Mental model

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Practical application

See the meme system you are embedded in

The topic trains a particular kind of self-observation. The political beliefs, religious traditions, food preferences, fashions, slang, and ideological frames you carry are not free choices — they are memes that propagated into your brain because of specific evolutionary advantages in their meme ecology. Knowing this does not make them less true or less useful, but it does locate them in a different metaphysical category than you may have assumed. Some of your beliefs are there because they serve you; some are there because they serve themselves.

Apply the three replicator properties to any culture

A successful cultural meme — a brand, a movement, a slogan — has the same three properties as a successful gene: it is fecund (easily reproduced), faithful (the message survives transmission with low corruption), and persistent (it lasts long enough to be re-transmitted). Brands that confuse these properties die. Movements that lose any of the three peter out. The framework predicts which cultural artifacts will spread.

Notice meme/gene conflict in your own life

Some of your most consequential decisions — to have children or not, to pursue a career or build a family, to follow your tradition or break with it — are decisions in which your meme system and your gene system are giving different advice. Knowing which voice is which is its own form of self-knowledge.

Example

Consider the meme of "free software" (Richard Stallman's GNU project, Linux, open-source culture). It propagates through brains by imitation and conversion. It includes self-spreading instructions ("share the code"), in-group identification (the hacker community), inoculation against rivals (anti-Microsoft, anti-proprietary), and rewards (community status, technical respect). It also competes against rival memes (proprietary software ideology).

The meme has no genetic stake in its hosts. A programmer who devotes nights and weekends to maintaining open-source code is, in gene-level accounting, spending resources that could go to mating or child-rearing. The meme has co-opted the carrier's behavior for its own propagation. The carriers gain something — community, status, intellectual satisfaction — but the meme system as a whole is evolving by its own logic, not by the genetic logic of its hosts.

This is the topic's claim in modern dress. Whatever you give your time to, ask: am I serving my genes, my memes, or both?

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