evilthecat said:
Flatfrog said:
Evolution works on a cultural level as well as (in human society much more than) a genetic level. Humans adopt survival strategies based on cultural norms and family patterns, as well as through individual rational and emotional decision-making.
Proteins exist in a relatively simple and stable fashion. You can tell where one protein ends and another begins quite easily provided you can see or detect them. Social structures or cultural trends do not work like that, they are not dividable into "units", and they generally do not conform to an overarching narrative of survival.
Nor do genes. Survival is always down to the interplay of thousands of genes in complex ways, and an individual mutation doesn't have survival value in and of itself except in the context of an environment of other genes, including those in other species. That's no different from cultural norms (I've been mostly avoiding the word 'meme' because it has so much garbage associated with it, but that's what I'm talking about)
So it isn't like "This society has selected cultural trait B from the list of options A to C, and family pattern E from the list of options A to F, therefore it's survival metric is 7.6. If it replaced its family pattern with option B then its score would rise to 9.7, therefore it will do so eventually."
"Survival" (at least individual survival) long since ceased to be the goal of human society. We aren't picking options to increase our survival, we're generally picking options according to systems of rationality to which we either conform or resist, and many of these are extremely arbitrary.
Evolution is always arbitrary, and yet patterns emerge. There are certain high-level strategies which emerge time and again - predator, grazer, scavenger, parasite; monogamy, harems, leks, courtship displays; etc
Cultural evolution is the same. From multiple individual norms emerge political philosophies which appear in societies all over the world. And of course, there is no 'survival metric', just as there isn't in biological evolution. A strategy like free market economics only works in a culture which accepts the rule of law. And criminality only works as a strategy when there are enough property owners to support it. In less lawful societies, blood ties are more important as a means of building trust, and so on. These things can be modelled successfully using simple evolutionary principles.
And yes, it's not about 'survival' in the physical sense, although for a hefty proportion of the world it still is, but still, memes survive by copying and we copy the behaviour of those around us who we perceive as successful, therefore in the meme world, 'success' (financial, sexual, emotional) takes the place of survival as the metric for which norms of behaviour will take hold and which ones will not.