Cultures are not remarkably consistent, and if you don't believe me, just look at how much European cultures have changed since 1900. Cultures are always in flux, and they're always comprised of factions seeking to influence the culture. Continuity of culture is an illusion.
Actually, scientifically speaking, that's not true at all.
Recent findings show that culture is hard wired into the genome.
“We found that in this case, the culture was pretty much encoded in the genome,” said Partha Mitra of Cold Spring Harbor Laboratory in New York, co-author of a study in Nature on Sunday.
Birds transmit their songs through social interactions, as humans do for languages, dances, cuisine and other cultural elements. Though birds and humans have clearly followed different evolutionary paths, birdsong culture can still inform theories of human culture.
Normally, male finches learn their complex courtship songs (MP3) from their uncles and fathers. But if there are no vocal role models around, the song will deviate from the traditional song and be harsh to female finch ears (MP3). Each bird, then, must learn from his father or uncles, as they learned from their fathers, and so on — but this can only take us so far down the lineage.
“It’s the classic ‘chicken and the egg’ puzzle,” Mitra said. “Learning may explain how the son copies its father’s song, but it doesn’t explain the origin of the father’s song.”
Mitra’s team wanted to find out what would happen if an isolated bird raised his own colony. As expected, birds raised in soundproof boxes grew up to sing cacophonous songs.
But then scientists let the isolated birds give voice lessons to a new round of hatchlings. They found that the young males imitated the songs — but they tweaked them slightly, bringing the structure closer to that of songs sung in the wild. When these birds grew up and became tutors, their pupils’ song continue to conform, with tweaks.
After three to four generations, the teachers were producing strapping young finches that belted out normal-sounding songs.
You can listen to the progression below, but keep in mind that the elements that are important to female finches — duration of beats, rise and fall of pitch — can be difficult for the untrained human ear to pick up on. (QuickTime works best for these)
birds raised in isolation (MP3)
first generation (MP3)
second generation (MP3)
third generation (MP3)
fourth generation (MP3)
wild birds (MP3, MP3)
“It all happened so fast, and there was so little difference between the colony and in the one-to-one tutoring environment,” said lead author Olga Fehér of City College of New York. “So the process is pretty much hardwired. And the interesting thing was also that they could only get so close in a single generation, so the three to four generations were necessary for the phenotype to emerge.”
http://www.wired.com/wiredscience/2009/05/songbirdculture/
You might want to re-evaluate what you think culture actually is.