>>14232200When a culture changes, the selection pressure it applies to humans changes too. And humans lose their tendency to produce the old culture. And acquire a tendency to produce the new culture.
When a human changes, the selection pressure applied to his cells changes too. And this change, over time, is encoded in their DNA. Cells lose their ability to construct the old human. And acquire an ability to construct the new human.
From our cells' point of view, we exist to give them home and food. And if all our cells disappear, we would lose this function too. Like a culture dies without people, a man dies without cells.
Like how cultures depend on us to replicate, we depend on our cells to replicate. Our current cultures are closer to a bacteria colony than an animal, but still.