As you have mention life spans have increased exponentially so our children can enjoy life longer,travel if so wish, enjoy life without responsibility of motherhood and security.
Here in Australia, No need to breed many offsprings to support you in old age.
Just as our present beliefs and lifestyle wouldn't work in caveman days.
Caveman day's beliefs and lifestyle will not be acceptable now in the present.
Evolution is always changing,making improvements to save the species.
If Certain Species Can't move on,they should go back to their caves and socialise only amongst themselves,until they are prepared to make changes in a ever changing World.
