Rock n Roll spearheaded the division of the human species into niche markets by inspiring an entire generation of youngsters to believe that their needs differed from those of their parents. Be we housewife or hot-shot business exec., sportman or supreme highness, that magic lamp hidden in the roof makes all the difference in the world to our pleasure and productivity. The sauna, the invigorating shower, the long, leisurely bath before going out on a date with our Dreamboat, the fresh, clean laundry, the sparkling crockery etc., come very short when the water is cold. Later a lightning-strike during a thunderstorm at the foundry in Silicone Valley resulted in the electric mutation common in offices today. Wealth equals knowledge , understanding and materials.
Human sight deteriorates with age.
Spectacles corrects this. This enables human productivity until death,instead of till inability to read. Lots of university professors, inventors, newspapers, novelists, tycoons, accountants, etc followed in due course. Without doubt the invention has been the telephone. No other invention has succeeded in contributing towards globalisation and the breaking down of country barriers.