Replication...

If the average marrage age continues to rise, there would be some day when over 90% kids would be defective in someway; when all of the parents are over age 50; when kids never get to see their grandparents.

If more and more of the highly educated population choice to give birth at an older age, or even avoid having kids, then the knowledge and book loving charectors of humans would soon be extinct.

It's an age when the people who consider their selves "smarter then average" are actually "dumbber then average" .