We, human beings, are products of our environment. This sounds like something a Marxist-inspired social scientist would say. But in this book Susan Blackmore argues for the same case, but probably will find these same social scientists (and all political correct thinkers with them) in her way. The main thesis of this book is as follows.
Human beings, like all animals, plants, funci, bacteria and protozoa on this planet, are products of biological evolution. Our 'design' comes from the algorithmic processes of nature. Unlike the rest of nature, we seem to have culture; this begs for an explanation: if culture is such a 'Good Trick' then why don't we see other organisms having the same thing?
Blackmore argues that what distinguishes us from the rest of nature is our ability to imitate. We observe other people doing things, put ourselves in the (mental) shoes of these other people and then do these things ourselves. This sounds simple, but it really isn't - the only thing in nature coming close is birdsong.
Imitation leads inevitably to the existence of pieces of information - memes. Considering there's a finite amount of minds, time, energy, etc. (i.e. genetic constraints), the memes will compete with each other fro our attention and imitation. This leads, by definition, to memetic selection: some memes will fare better than others. Blackmore zooms in on this last issue and builds up a whole new edifice of a new science of memetics on this central issue. What memes are more succesful than others? And more importantly, why?
In summary: whenever an entity that makes copies of itself (i.e. a replicator) originates, with the three key ingredients high copying-fidelity, high fecundity and longevity, a process of selection starts. This unguided algorithmic process leads to the appearance of design. Pieces of information are such replicators, competing for our minds. So after discovering the gene, we have dsicovered a second replicator: the meme. Natural and memetic selection have shaped us and are still shaping us.
In the first third of this book, Blackmore explains her main thesis in easy-to-follow arguments and makes a strong case for the existence of memes and their impact on our lifes. She overstretches her hand a bit when she postulates memes as the origin (cause?) of our large brains and our innate language module. There's still much unknown about the origin of the growth of our brains and the origin of language. To be fair, Blackmore deals with all the possible theories on these two topics and only then offers her own explanation.
The second third of the book , Blackmore shows the power of the theory of memes: she applies her theory to such topics as sex, altruism, New Age phenomena (UFO's, near death experiences, fortune telling, homeopathy, etc.) and religions. In all these cases memetics explains the phenomena better than the rival theories - according to Blackmore. Why do New Age phenomena persist? Because the memes making up these phenomena play on our genetic needs (e.g. the need for understanding/the need for explaining unknown but impressive events). Why do religions exist? Because of our natural reverence for powerful males, high in the hierarchy - so the Catholic God is a sky-daddy (in the words of Richard Dawkins). Why does altruism exist? Sociobiological explanations are good, but - according to Blackmore - do not tell the whole story: we have a innate (i.e. genetic) need to be liked by others. Memes that make you more likeable thrive; you look for mates who are more likeable imitators; memes start "to infect us with altruism". Memetic selection even explains why we (in modern societies) give up the notion of 'sex to reproduce' and use contraceptives en masse. Memes of 'sex for fun' play on our (genetic) drive to enjoy sex, thereby spreading themselves.
The third part consists of an exposition on the internet - the memes' way of seeking a mechanism that leads to higher fidelity, high longevity and higher fecundity in copying themselves. (I saw a recent Ted-talk by Blackmore and she seems to have updated this part of her book with a new (third) replicator: genes, memes and temes.) She closes the book with a dismantling of our illusion of consciousness: the 'self' is itself a complex of memes - a selfplex. There is no single center of consciousness in our brains (Dennett's Cartesian Theatre) and there is no such thing as free will. There is only natural and memetic selection battling it out with eachother with our minds as the primary battleground. This is certainly an interesting notion, something that connects with my own thoughts on consciousness and free will, so I guess this new meme fits neatly in my current memeplex...
This is all interesting, but is it true? Blackmore proposes this book as the foundation of a new science of memetics. A scientific theory should at least lead to (1) testable predictions that make it possible to refute (parts of) the theory and should lead to (2) a new understanding of existing or not-yet-known phenomena (in other words: it should explain something better than existing theories). Throughout the book Blackmore derives testable hypotheses of her main theory, so I guess she accomplishes the first part of building a scientific theory. (One could argue about the specificity of her predictions; they need a lot more fine-tuning to be specific and refutable, but let's grant her this point, it's a start). Blackmore takes up the second problem of a scientific theory with fervor and class: throughout the book she favors evolutionary psychological or sociobiological explanations, but in all these claims these theories (of explaining human behaviour in light of evolution) are not complete enough. She does this to make some room for her own theory, which in itself is a strong case of good science.
If one judges this book on the author's own terms (offering a scientific theory of culture in terms of memes), one can only congratulate Blackmore on the attempt. It's amazing how she is able to build an edifice of a whole new building and how she's able to tell the story in an interesting and comprehensible style. A superb book that offers profound and far-reaching insights!
On a side note: She cites E.O. Wilson as claiming that 'genes have culture on a leash'. As far as I can see (which is not far, in any case), Wilson is right in saying this. What he meant is (I guess) that culture has a maximum variability, and this variability is directly related to our genes. So considering the human being as he/she is, it's (nearly) impossible to find or 'create' a culture that is built on, for instance, complete egalitarianism, celibacy or starvation. This is simply impossible, considering who we are (our genetic ancestry).
Blackmore claims that memes can make us do things contra our nature: the celibate priest or our use of contraceptives are her most vivid and strongest examples. But celibacy is a very dubious concept; there's a lot of evidence that so called celibate priests were either suffering a lot (confirming Wilson's statement of the genetic leash) or where simply not celibate and having illegal children with married women (confirming Wilson's statement of the genetic leash). The same with contraceptives: even though in our Western culture the use of contraceptives has skyrocketed in just 50 years, children are still being born by the dozens (confirming Wilson's statement of the genetic leash). The growth has been checked, but ceasing with sexual reproduction is, for all practical purposes, simply impossible. I guess Wilsons insight is meant as describing the (human) playing field that memes can use for their own reproduction. (Keeping in mind that his language is metaphorical, ofcourse).