I am, I admit, new at this subject and freely admit I haven't read all of the prior discussions (yet! Promise I will ;) so if this has come up before I apologise. I have often thought about memes and wondered how memes have shaped genetics. Certainly and obviously the memes of humans about breeding animals have shaped the genes of domesticated species; notably cattle, cats, dogs, horses and pigeons etc. Even to the extent that some animals are now completely reliant on human supervisors for their survival (in the case of birthing and even feeding their young!)
In the same vein cultural memes must have had to some degree shaped the genetics of humans, the initial idea of survival of the family group, changing to sociable groups of numerous families and then laws being put in place (memes) to punish and execute/banish those who were excessively violent, too rebellious or destructive and couldn't conform to the new social formations. Those that prospered and gained position in tribes would generally produce more offspring and thus affect the gene pool.
To clarify I'm not suggesting eugenics or genocide here, sick regimes that have attempted this in the past are not what I'm referring too. I am suggesting that early on in the birth of society during the origin of memes those that could learn language or concepts, obey laws and were sociable were fitter and those genes for learning memes, empathy and conforming behaviours would have flourished in the new environment.
Don't mind being shot down in flames or being pointed to a prior post, just wandered what people thought. Great group btw ;). J