There was a time when there were no computers let alone e-mails. But mankind survived through sheer grit and hard work. Success naturally followed for those who never gave up.
In an Asian society, parents have the upper hand in showing their children how to respect the elders.
Asian parents teach their children what respecting elders is all about FROM THE VERY BEGINNING.
If any child throws any tantrums in public or misbehaves in public for no apparent reason, that child will get a smack there and then. For that reason, filial piety is very much a part of Asian culture till today.
Naturally, Asian children know their boundaries from a very young age.