Not actually so.

Have a look at some of the innovations before central banks and fiat money took over in 1914. AC motor and transformer, air conditioning, automobile, battery, dishwasher, electric light, radar, refridgerator, steam turbine, telegraph, telephone...

You will understand, that fiat money era inventions (the internet, smartphones and countless other modern conveniences) are only advancements of the previous technology, not something new that only appeared during the fiat money era.