Quotes / Giving Radio to the Romans

Easy-peasy I'm sure. Just describe this technology that you don't understand to people who don't understand it and bam! Instant industrial revolution, why didn't anyone else think of that?

"You give them breech-loading guns now, they'll have atomic weapons by the seventeenth century. They'll have the capability to destroy their own planet before they're civilised enough to handle it!"
The Doctor, Doctor Who, "The Time Warrior"