Is It a Matter of Culture, or Genetic Evolution?

Many of the traditions and responsibilities people grown up with through most of human history, or many of those are now put to the side. The notion that we really don't have bother having children probably doesn't have much of a future. What's wrong with the fast changing norm so we've, again, in america, and much in good chunks the western world, and it may spread elsewhere? A things that were understood to be obviously true five years ago, i'll take freedom of speech, just to pick an obvious one, that's now seen as bad.