That depends on the particular cultural change.
In a case like using genetic engineering to produce superior humans there are pressures. If you have a few people doing it and they get benefits there cultural pressure for other people to also want the benefits.
That depends on the particular cultural change.
In a case like using genetic engineering to produce superior humans there are pressures. If you have a few people doing it and they get benefits there cultural pressure for other people to also want the benefits.